Investigations carried out in the recent few decades reveal the advantages of cryogenic
treatment as one of the promising techniques to enhance wear resistance in certain tool steels. Thus the
cryogenic treatment has significant influence on the tribological performance of tool steels. It is a one
time permanent treatment process affecting the entire section of the part, unlike coatings. Enhancing the
wear resistance and service life of the steel tools subjected to rubbing condition is of important concern.
Literature provides information about the investigations performed on some high-speed steels which
reveal remarkable improvement in wear resistance from 92% to 817%. Furthermore, the studies
conducted on conventional D3 tool steel reveals the betterment of certain tribo-mechanical properties
such as hardness and wear resistance. In the present investigation the effect of cryogenic treatment on
austenitic ductile iron type D3 tool steel is studied by sliding the test specimen against the same mating
material. The study reveals increase in hardness, reduction in friction coefficient and enhancement in
wear resistance
Effect of cryogenic treatment on tool steel (aisi ¬d2)eSAT Journals
Abstract
In present scenario modernization of machine tools is on prime consideration that is an optimization of desired properties in machine tool parts means alternation of properties for that previously we employed heat treatment of steel, thus we have some improved properties but does not achieved correct solution for the problem. In modern age a new technology is comes on the front line, recognize by Acronyms C.T.P. or Cryogenic treatment of steel which has been done in cooling Atmosphere below Atmospheric tem. About – 1960C or- 3100F. During this temp. Range conversion of Austenite to marten site takes place. Thus we have got increased some desirable properties like reduced wear & Tear. Increased Hardness Micro- structure improved, Stress relieving properties also improved. In this paper tool Steel AISI- D2 is used for cryogenic treatment & study is performed regarding Micro- structure and Hardness, after Cryogenic treatment comparison is also made with un-treated test specimen.
Keywords:-AISI- D2, Cryogenic Treatment, Phase Transformation, Hardness, Micro- Structure
Effects of cryogenic treatment on tool steel aisi d6eSAT Journals
Abstract
In present technological modern age. All the manufacturers adopt that process which governs to higher productivity that has been achieved by the various treatment of tool steel. These conventional processes improve no of characteristics to fulfill desired purpose. But all these process does not provided fully satisfaction from conventional heat treatment process. Thus a new process is being additionally employed for improving mechanical properties called cryogenic treatment process or sub-zero treatment of tool steels. During this process tool steel is proceed below Atmospheric tem. That is in minus about (-1960 C or 3100 F). Due to cooling, steel alter their mechanical properties like wear resistance, Hardness, toughness, fatigue life micro-structure alteration etc. Cryo-treatment not only improve its mechanical properties but also improve thermal properties, electrical properties & easier machining etc. in this paper cryogenic treatment of tool steel AISI-D6 is perform and study is made for wear-resistance, Hardness, toughness, with respect to untreated test specimen of same, we have got improved wear-resistance capacity improve hardness as well as toughness.
Keywords – AISI-D6 tool steel, cryogenic process, wear resistance, Hardness, Toughness.
Effect of cryogenic treatment on tool steel (aisi ¬d2)eSAT Journals
Abstract
In present scenario modernization of machine tools is on prime consideration that is an optimization of desired properties in machine tool parts means alternation of properties for that previously we employed heat treatment of steel, thus we have some improved properties but does not achieved correct solution for the problem. In modern age a new technology is comes on the front line, recognize by Acronyms C.T.P. or Cryogenic treatment of steel which has been done in cooling Atmosphere below Atmospheric tem. About – 1960C or- 3100F. During this temp. Range conversion of Austenite to marten site takes place. Thus we have got increased some desirable properties like reduced wear & Tear. Increased Hardness Micro- structure improved, Stress relieving properties also improved. In this paper tool Steel AISI- D2 is used for cryogenic treatment & study is performed regarding Micro- structure and Hardness, after Cryogenic treatment comparison is also made with un-treated test specimen.
Keywords:-AISI- D2, Cryogenic Treatment, Phase Transformation, Hardness, Micro- Structure
Effects of cryogenic treatment on tool steel aisi d6eSAT Journals
Abstract
In present technological modern age. All the manufacturers adopt that process which governs to higher productivity that has been achieved by the various treatment of tool steel. These conventional processes improve no of characteristics to fulfill desired purpose. But all these process does not provided fully satisfaction from conventional heat treatment process. Thus a new process is being additionally employed for improving mechanical properties called cryogenic treatment process or sub-zero treatment of tool steels. During this process tool steel is proceed below Atmospheric tem. That is in minus about (-1960 C or 3100 F). Due to cooling, steel alter their mechanical properties like wear resistance, Hardness, toughness, fatigue life micro-structure alteration etc. Cryo-treatment not only improve its mechanical properties but also improve thermal properties, electrical properties & easier machining etc. in this paper cryogenic treatment of tool steel AISI-D6 is perform and study is made for wear-resistance, Hardness, toughness, with respect to untreated test specimen of same, we have got improved wear-resistance capacity improve hardness as well as toughness.
Keywords – AISI-D6 tool steel, cryogenic process, wear resistance, Hardness, Toughness.
Review of the cryogenic machining in turning and milling processeSAT Journals
Abstract Cryogenic Coolents are used in conventional machining in material removing process can increase tool life, better surface finish, dimensional accuracy, and reduce the cutting temp. Main objectives of this paper is to understand the cryogenic machining operations. Various research scholar has done the experimental investigation on the cryogenic coolants in different materials in turning and milling Process,. At the end of the review obsrved that cryogenic coolant is most favourable methods for material cutting operations in various aspects for future research is proposed. Key Words: Cryogenic coolents and Machining, Literature Review, cryogenic LN2Setup, cryogenic CO2 Setup,
This module contain information about various processes involved in heat treatment process.Figures are also there to evaluate and understand the information properly.
STUDY OF MICRO STRUCTURE OF HEAT TREADTED EN8 STEEL Anis Haider
EN8 is a very popular grade of through-hardening medium carbon steel, which is readily machined able in any condition. EN8 is suitable for the manufacture of parts such as general-purpose axles and shafts, gears, bolts and studs
Experimental Analysis using Established Parameters for Cryogenic Treatment on...IJAEMSJORNAL
The experimental analysis on cutting tool material is done with referring the established parameters for Cryogenic Treatment. The pilot experimentation is carried out using the Conventional heat treated tool bits as supplied condition and Cryogenic treated tools. The three grades of high speed steel are identified for the investigation purpose and for pilot experimentation H.S.S. T42 grade is selected. The tool material procured is strictly as per the grade specifications for the investigation of effect of cryogenic treatment on tool life. The established parameters for cryogenic treatment are identified referring to previous published research and machining parameters as per the industry specifications. The pilot experimentation using Untreated and treated tools are subjected to turning operation on CNC turning center for a definite work material and machining parameters such as cutting speed, feed and depth of cut are identified. Single point cutting Tool geometry is maintained as per the tool signature and length of the tool is maintained as per the limitations of the machine. The Surface Roughness of the machined work piece is measured using the Taylor Hob-son Surface Roughness tester and the Tool wear is measured using the Tool Makers microscope. The results are tabulated. An experimental effort to understand the effect of Untreated and Cryogenic treated tool on the tool life is the outcome of this paper. The outcome of this paper forms the basis of experimentation using the Orthogonal array for all the selected grades of the material.
A review of effect of welding and post weld heat treatment on microstructure ...eSAT Journals
Abstract
Today getting high thermal efficiency in thermal and nuclear power plant is a big challenge. Many new material are developed. SA 335 grade 91 steel is modified high chrome-moly martenstitic steel. This material is having excellent toughness and high temperature creep strength. During welding, this material is having tremendous change in its microstructure and hence mechanical property. Many research works were done in this area. This paper discusses weld ability of P91 material. Effect of different welding process, type of filler wire, its chemical composition and type of flux is discussed in this paper. PWHT is necessary after welding of P91 steel. PWHT temperature and its duration affects phase transformation and mechanical properties of weld metal, HAZ and parent metal. Major focus is given on hardness, creep resistance and notch toughness.
Keywords - P91, Welding, Microstructure, Toughness, Creep, Hardness, PWHT
The effect of welding heat input and welding speed on microstructure of chrom...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Experimental Investigation on Characteristic Study of the Carbon Steel C45 in...IJMER
In this paper, the mechanical characteristics of C45 medium carbon steel are investigated
under various working conditions. The main characteristic to be studied on this paper is impact toughness
of the material with different configurations and the experiment were carried out on charpy impact testing
equipment. This study reveals the ability of the material to absorb energy up to failure for various
specimen configurations under different heat treated conditions and the corresponding results were
compared with the analysis outcome
Review of the cryogenic machining in turning and milling processeSAT Journals
Abstract Cryogenic Coolents are used in conventional machining in material removing process can increase tool life, better surface finish, dimensional accuracy, and reduce the cutting temp. Main objectives of this paper is to understand the cryogenic machining operations. Various research scholar has done the experimental investigation on the cryogenic coolants in different materials in turning and milling Process,. At the end of the review obsrved that cryogenic coolant is most favourable methods for material cutting operations in various aspects for future research is proposed. Key Words: Cryogenic coolents and Machining, Literature Review, cryogenic LN2Setup, cryogenic CO2 Setup,
This module contain information about various processes involved in heat treatment process.Figures are also there to evaluate and understand the information properly.
STUDY OF MICRO STRUCTURE OF HEAT TREADTED EN8 STEEL Anis Haider
EN8 is a very popular grade of through-hardening medium carbon steel, which is readily machined able in any condition. EN8 is suitable for the manufacture of parts such as general-purpose axles and shafts, gears, bolts and studs
Experimental Analysis using Established Parameters for Cryogenic Treatment on...IJAEMSJORNAL
The experimental analysis on cutting tool material is done with referring the established parameters for Cryogenic Treatment. The pilot experimentation is carried out using the Conventional heat treated tool bits as supplied condition and Cryogenic treated tools. The three grades of high speed steel are identified for the investigation purpose and for pilot experimentation H.S.S. T42 grade is selected. The tool material procured is strictly as per the grade specifications for the investigation of effect of cryogenic treatment on tool life. The established parameters for cryogenic treatment are identified referring to previous published research and machining parameters as per the industry specifications. The pilot experimentation using Untreated and treated tools are subjected to turning operation on CNC turning center for a definite work material and machining parameters such as cutting speed, feed and depth of cut are identified. Single point cutting Tool geometry is maintained as per the tool signature and length of the tool is maintained as per the limitations of the machine. The Surface Roughness of the machined work piece is measured using the Taylor Hob-son Surface Roughness tester and the Tool wear is measured using the Tool Makers microscope. The results are tabulated. An experimental effort to understand the effect of Untreated and Cryogenic treated tool on the tool life is the outcome of this paper. The outcome of this paper forms the basis of experimentation using the Orthogonal array for all the selected grades of the material.
A review of effect of welding and post weld heat treatment on microstructure ...eSAT Journals
Abstract
Today getting high thermal efficiency in thermal and nuclear power plant is a big challenge. Many new material are developed. SA 335 grade 91 steel is modified high chrome-moly martenstitic steel. This material is having excellent toughness and high temperature creep strength. During welding, this material is having tremendous change in its microstructure and hence mechanical property. Many research works were done in this area. This paper discusses weld ability of P91 material. Effect of different welding process, type of filler wire, its chemical composition and type of flux is discussed in this paper. PWHT is necessary after welding of P91 steel. PWHT temperature and its duration affects phase transformation and mechanical properties of weld metal, HAZ and parent metal. Major focus is given on hardness, creep resistance and notch toughness.
Keywords - P91, Welding, Microstructure, Toughness, Creep, Hardness, PWHT
The effect of welding heat input and welding speed on microstructure of chrom...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Experimental Investigation on Characteristic Study of the Carbon Steel C45 in...IJMER
In this paper, the mechanical characteristics of C45 medium carbon steel are investigated
under various working conditions. The main characteristic to be studied on this paper is impact toughness
of the material with different configurations and the experiment were carried out on charpy impact testing
equipment. This study reveals the ability of the material to absorb energy up to failure for various
specimen configurations under different heat treated conditions and the corresponding results were
compared with the analysis outcome
Characterization and Performance Evaluation of HSS Cutting Tools under deep C...inventy
Research Inventy : International Journal of Engineering and Science is published by the group of young academic and industrial researchers with 12 Issues per year. It is an online as well as print version open access journal that provides rapid publication (monthly) of articles in all areas of the subject such as: civil, mechanical, chemical, electronic and computer engineering as well as production and information technology. The Journal welcomes the submission of manuscripts that meet the general criteria of significance and scientific excellence. Papers will be published by rapid process within 20 days after acceptance and peer review process takes only 7 days. All articles published in Research Inventy will be peer-reviewed.
Machinability evaluation of cryogenically tempered die steel in electric disc...eSAT Journals
Abstract Electrical discharge drilling (EDD) is a well-known machining alternative for creating geometrically obscure shapes in die steel. Cryogenic temper of work and electrode material is innovative technology in the field of EDD. Work in hand investigates the effect of cryogenic tempering of AISI D2 steel (workpiece) and copper electrode (tool) on material removal rate (MRR) in EDD based on design of experiments approach. The discharge current, pulse-on-time and electrode-workpiece combination (cryogenically tempered or untempered) are the parameters selected for this study. The orthogonal array, signal-to-noise ratio (S/N) and analysis of variance (ANOVA) are used to find out the effect of cryogenic tempering on MRR. The results obtained demonstrate that the discharge current and pulse-on-time are the major parameters influencing the MRR for all samples, followed by electrode-workpiece combination i.e. cryogenic tempering of electrode and workpiece. Cryogenic tempering is found to have significant effect (nearly 10%) on MRR. It is recommended to cryogenically temper both the electrode and workpiece to maximize the MRR. Index Terms: Electric discharge drilling, Cryogenic tempering, Die steel, copper electrode
3D Printing Market : Pin-Point Analysis of Industry Trends & Recent Technolog...Allied Market Research
3D Printing Market Report, published by Allied Market Research, forecasts that the global market is expected to garner $8.6 billion by 2020, registering a CAGR of 21% during the period 2015-2020. This surge in growth is primarily attributed to the rising demand for faster and efficient ways to manufacture complex design objects using a wide array of materials.
Get Sample of this report : https://goo.gl/kTpMki
Experimental Investigation of Performance & Emission Characteristics of Diese...IJMER
International Journal of Modern Engineering Research (IJMER) is Peer reviewed, online Journal. It serves as an international archival forum of scholarly research related to engineering and science education.
Cryogenic treatment is a secondary process to traditional heat treatment used for improving the hardness and wear resistance of tool steels. Though the potential use of cryogenic treatment on AISI D2 tool steel under laboratory conditions has been well established by the researchers, it is essential to do the analysis to ensure its sustainable use for industrial application. Therefore, impact of cryogenic treatment on AISI D2 steel blanking punch was evaluated in terms of increase in production rate and its life. The cryogenically treated D2 tool steel punches were used and subjected to manufacture the control levers using blanking operations. The improved wear resistance of cryogenically treated punch resulted in increase in production and punch life more than 200%. Punch life was studied and correlated to increase in production & wear behavior of blanking punch. The AISI D2 steel samples were prepared and subjected to laboratory tests comprising of metallographic observations and hardness. It was found that laboratory tests were not enough to predict improvements in mechanical properties. The mechanism responsible for augmented wear resistance by cryogenic treatment was the conversion of retained austenite to martensite and precipitation of new secondary carbides.
A Review on Mechanical and Wear Properties of Heat Treated SteelIJSRD
This Review Paper describes effects of heat treatment on various material by varying process parameters and by using different types of heat treatment process. The heat treatment includes heating & cooling operations or the sequence of two or more such operations applied to any material in order to modify metallurgical structure and alter its physical, mechanical and chemical properties. This Review paper shows progress and research in the field of heat treatment process. Different types of heat treatment processes such as annealing, normalising, nitriding, hardening, tempering carburising used & available in recent time. This paper deals with important progress work on heat treatment and its process parameters.
MECHANICAL PROPERTY ASSESSMENT OF AUSTEMPERED AND CONVENTIONALLY HARDENED AIS...IAEME Publication
The chemical composition and mechanical properties of steel decide its applicability for manufacturing various components in different areas of engineering interests. Heat treatment processes are commonly used to enhance the required properties of steel with or without change in chemical composition. The present work aims to perform conventional hardening and Austempering treatment with experimental investigation of the effect of austempering and conventional hardening (quenching) on AISI 4340 steel. Different tests like tensile, torsion, hardness, impact and microstructure analysis are carried out in as bought and heat treated conditions
Effect of Quenching Media on Mechanical Properties for Medium Carbon SteelIJERA Editor
In this research work the mechanical properties of medium carbon steel has been studied . the Steel AISI 1039
quenched in different quenching media. These quenching media were cold water, water , oil and hot water.
Hardness , tensile , impact and wear tests have been carried out for specimens after quenching in different
media.
It was found that the tensile strength and hardness increased with increasing the heating temperature values of
heat treatment process. Also quenching in cold water has a great effect on tensile strength and hardness values .
where the heights value for tensile strength was (998.6N/mm²) and the hardness was (360.4 Hv) for steel which
quenching in cold water. The percentage of elongation decreased with increasing the temperature of heat
treatment process. also the lowest values of elongation was after quenching process in cold water.
However, the impact toughness and wear rate values were high for alloy after stress relief and lower after
quenching in different media. But the lowest values were recorded after quenching in cold water. It was found
that the absorbed energy and the wear rate for the alloy quenched in cold water were (23.6) J and
(2x10¯⁷gm/cm) respectively. While, for steels treated with the stress relief process were (62.02) J and
(7x10¯⁷gm/cm) respectively.
Influence of Heat Treatment on Mechanical Properties of Aisi1040 SteelIOSR Journals
This investigation is concerned to evaluate the influence of heat treatment on mechanical behavior of AISI1040 steel; it is one of the grades of medium carbon steel of American standard containing 0.40% carbon in its composition. Specimen of quenched/hardened AISI1040 steel was tempered at temperature (650,450&250℃) for 60, 90&120 minutes to modify desired properties. The mechanical behavior, particularly, ultimate tensile strength, yield strength and elongation were investigated using universal testing machine; while the hardness measurement was done on Rockwell hardness testing machine of heat treated specimens. Result shows that the ultimate tensile strength and the yield strength decrease while the elongation increases with an increase in tempering temperature and tempering time of different tempered specimen. The hardness of quenched/hardened specimen decreases with an increase in tempering temperature and tempering time. Furthermore, increasing temperature and lowering time produces approximately same result as decreasing temperature and increasing time.
Effect of Hardness and Wear Resistance on En 353 Steel by Heat Treatment IJMER
En 353 steel is an easily available and cheap material that is acceptable for heavy duty
applications. Heat treatment on En 353 steel is improved the ductility, toughness, strength, hardness and
relive internal stress in the material. Spectrographic method is used to analyze the composition of the
alloy material. The experimental results of hardness and dry wear testing on pin-on-disc are done to get
idea about heat treated En 353 steel. It is found that the hardness and wear resistance of the En 353 steel
is improved after the heat treatment and the microstructure is changed from ferrite to martensite.
Proper heat treatment of steels is one of the most important factors in determining how they will
perform in service. Engineering materials, mostly steel, are heat treated under controlled sequence of
heating and cooling to alter their physical and mechanical properties to meet desired engineering
applications. In this study we have chosen AISI 1020 steel as for our research work and we have tried to
find out the mechanical properties (hardness) and micro structural properties (martensite formation,
carbon self-locking region) by means of appropriate heat treatment process (annealing, normalizing &
hardening). Here the steel specimens were heat treated in a furnace at different temperature levels and
soaking time; and then cooled in various media (air, ash, water). After that the hardness of the specimens
were rechecked for the comparison with previous data and the microstructures of the specimens were
examined using metallurgical microscope equipped with camera. These results showed that the hardness
of AISI 1020 steel can be changed and improved by different heat treatments for a particular application.
From the microstructures we have found that the annealed specimens with mainly ferrite structure give the
lowest hardness value and highest ductility while hardened specimens which comprise martensite give
the highest hardness value and lowest ductility. On the other hand, normalized specimens have given the
moderate hardness and ductility comparing with hardened and annealed specimens
Effect of deep cryogenic treatment on surface integrity and dimensional stabi...eSAT Journals
Abstract Deep cryogenic treatment is an add-on process to conventional heat treatment in which material is treated at cryogenic temperature. The mechanical properties of the tool steel are significantly improved by Deep Cryogenic treatment. Surface integrity and dimensional stability is having greater impact on the functional performance of the tool during service conditions. The objective of this work is to investigate the effect of deep cryogenic treatment on the surface integrity and dimensional stability of the D2 tool steel. The metallographic samples and Navy C Rings of D2 Tool steel were treated at cryogenic temperature of -1930C after hardening and tempering. Results have shown improvement in surface roughness. The improved surface roughness is attributed to the release of tensile residual stresses and more precipitation and uniform distribution of fine secondary carbides. DCT have higher shape distortion than CHT. The distortions in DCT can be attributed to the section sensitivity of D2 Tool steel. Keywords: Surface integrity, distortion, precipitation of secondary carbides, section sensitivity
VOLUME-7 ISSUE-8, AUGUST 2019 , International Journal of Research in Advent Technology (IJRAT) , ISSN: 2321-9637 (Online) Published By: MG Aricent Pvt Ltd
Effect of Subzero Treatment on Microstructure and Material Properties of EN...IJMER
Cryogenic treatment of steels has been widely used for enhancing mechanical properties
like hardness, toughness and stable metallurgical structure. Application such as gears, kicker rods,
bolts are made of medium carbon alloy steels like EN-24 steel. In these applications, percentage of
retained austenite has considerable effects on the life of the material. A comparative study on
conventionally heat-treated (CHT) and shallow cryogenic treated (SCT) EN-24 steel was done to
evaluate the effect of shallow cryogenic treatment (SCT) on hardness, toughness and the amount of
retained austenite present in the structure of EN24 steel. The microscopic structure of cryogenic
treated EN24 steel revealed the formation of carbides, both primary and secondary carbides. An
estimated amount of 15% retained austenite after CHT tempered condition was less than 2% after SCT
tempered condition. Tensile test fractography of subzero treated (SCT) specimen revealed ductile
fracture. The maximum hardness observed in case of SCT tempered samples was 415BHN, 15%
increase from CHT tempered samples. The maximum impact strength observed in case of SCT
tempered samples was 240kJ/m2, 11% increase from CHT tempered samples. Further SCT tempered
samples, tempered at 650°C resulted in ductility increase by 55% as compared to CHT tempered
samples without sacrificing hardness.
A Study on Translucent Concrete Product and Its Properties by Using Optical F...IJMER
- Translucent concrete is a concrete based material with light-transferring properties,
obtained due to embedded light optical elements like Optical fibers used in concrete. Light is conducted
through the concrete from one end to the other. This results into a certain light pattern on the other
surface, depending on the fiber structure. Optical fibers transmit light so effectively that there is
virtually no loss of light conducted through the fibers. This paper deals with the modeling of such
translucent or transparent concrete blocks and panel and their usage and also the advantages it brings
in the field. The main purpose is to use sunlight as a light source to reduce the power consumption of
illumination and to use the optical fiber to sense the stress of structures and also use this concrete as an
architectural purpose of the building
Developing Cost Effective Automation for Cotton Seed DelintingIJMER
A low cost automation system for removal of lint from cottonseed is to be designed and
developed. The setup consists of stainless steel drum with stirrer in which cottonseeds having lint is mixed
with concentrated sulphuric acid. So lint will get burn. This lint free cottonseed treated with lime water to
neutralize acidic nature. After water washing this cottonseeds are used for agriculter purpose
Study & Testing Of Bio-Composite Material Based On Munja FibreIJMER
The incorporation of natural fibres such as munja fiber composites has gained
increasing applications both in many areas of Engineering and Technology. The aim of this study is to
evaluate mechanical properties such as flexural and tensile properties of reinforced epoxy composites.
This is mainly due to their applicable benefits as they are light weight and offer low cost compared to
synthetic fibre composites. Munja fibres recently have been a substitute material in many weight-critical
applications in areas such as aerospace, automotive and other high demanding industrial sectors. In
this study, natural munja fibre composites and munja/fibreglass hybrid composites were fabricated by a
combination of hand lay-up and cold-press methods. A new variety in munja fibre is the present work
the main aim of the work is to extract the neat fibre and is characterized for its flexural characteristics.
The composites are fabricated by reinforcing untreated and treated fibre and are tested for their
mechanical, properties strictly as per ASTM procedures.
Hybrid Engine (Stirling Engine + IC Engine + Electric Motor)IJMER
Hybrid engine is a combination of Stirling engine, IC engine and Electric motor. All these 3 are
connected together to a single shaft. The power source of the Stirling engine will be a Solar Panel. The aim of
this is to run the automobile using a Hybrid engine
Fabrication & Characterization of Bio Composite Materials Based On Sunnhemp F...IJMER
The present day technology demands eco-friendly developments. In this era the
composite material are playing a vital roal in different field of Engineering .The composite materials
are using as a principle materials. Nowaday the composite materials are utilizing as a important
component of engineering field .Where as the importance of the applications of composites is well
known, but thrust on the use of natural fibres in it for reinforcement has been given priority for some
times. But changing from synthetic fibres to natural fibres provides only half green-composites. A
partial green composite will be achieved if the matrix component is also eco-friendly. Keeping this in
view, a detailed literature surveyed has been carried out through various issues of the Journals
related to this field. The material systems used are sunnhemp fibres. Some epoxy and hardener has
been also added for stability and drying of the bio-composites. Various graphs and bar-charts are
super-imposed on each other for comparison among themselves and Graphs is plotted on MAT LAB
and ORIGIN 6.0 software. To determining tensile strengths, Various properties for different biocomposites
have been compared among themselves. Comparison of the behaviour of bio-composites of
this work has been also compare with other works. The bio-composites developed in this work are
likely to get applications in fall ceilings, partitions, bio-degradable packagings, automotive interiors,
sports things (e.g. rackets, nets, etc.), toys etc.
Geochemistry and Genesis of Kammatturu Iron Ores of Devagiri Formation, Sandu...IJMER
The Greenstone belts of Karnataka are enriched in BIFs in Dharwar craton, where Iron
formations are confined to the basin shelf, clearly separated from the deeper-water iron formation that
accumulated at the basin margin and flanking the marine basin. Geochemical data procured in terms of
major, trace and REE are plotted in various diagrams to interpret the genesis of BIFs. Al2O3, Fe2O3 (T),
TiO2, CaO, and SiO2 abundances and ratios show a wide variation. Ni, Co, Zr, Sc, V, Rb, Sr, U, Th,
ΣREE, La, Ce and Eu anomalies and their binary relationships indicate that wherever the terrigenous
component has increased, the concentration of elements of felsic such as Zr and Hf has gone up. Elevated
concentrations of Ni, Co and Sc are contributed by chlorite and other components characteristic of basic
volcanic debris. The data suggest that these formations were generated by chemical and clastic
sedimentary processes on a shallow shelf. During transgression, chemical precipitation took place at the
sediment-water interface, whereas at the time of regression. Iron ore formed with sedimentary structures
and textures in Kammatturu area, in a setting where the water column was oxygenated.
Non linear analysis of Robot Gun Support Structure using Equivalent Dynamic A...IJMER
Robot guns are being increasingly employed in automotive manufacturing to replace
risky jobs and also to increase productivity. Using a single robot for a single operation proves to be
expensive. Hence for cost optimization, multiple guns are mounted on a single robot and multiple
operations are performed. Robot Gun structure is an efficient way in which multiple welds can be done
simultaneously. However mounting several weld guns on a single structure induces a variety of
dynamic loads, especially during movement of the robot arm as it maneuvers to reach the weld
locations. The primary idea employed in this paper, is to model those dynamic loads as equivalent G
force loads in FEA. This approach will be on the conservative side, and will be saving time and
subsequently cost efficient. The approach of the paper is towards creating a standard operating
procedure when it comes to analysis of such structures, with emphasis on deploying various technical
aspects of FEA such as Non Linear Geometry, Multipoint Constraint Contact Algorithm, Multizone
meshing .
Static Analysis of Go-Kart Chassis by Analytical and Solid Works SimulationIJMER
This paper aims to do modelling, simulation and performing the static analysis of a go
kart chassis consisting of Circular beams. Modelling, simulations and analysis are performed using 3-D
modelling software i.e. Solid Works and ANSYS according to the rulebook provided by Indian Society of
New Era Engineers (ISNEE) for National Go Kart Championship (NGKC-14).The maximum deflection is
determined by performing static analysis. Computed results are then compared to analytical calculation,
where it is found that the location of maximum deflection agrees well with theoretical approximation but
varies on magnitude aspect.
In récent year various vehicle introduced in market but due to limitation in
carbon émission and BS Séries limitd speed availability vehicle in the market and causing of
environnent pollution over few year There is need to decrease dependancy on fuel vehicle.
bicycle is to be modified for optional in the future To implement new technique using change in
pedal assembly and variable speed gearbox such as planetary gear optimise speed of vehicle
with variable speed ratio.To increase the efficiency of bicycle for confortable drive and to
reduce torque appli éd on bicycle. we introduced epicyclic gear box in which transmission done
throgh Chain Drive (i.e. Sprocket )to rear wheel with help of Epicyclical gear Box to give
number of différent Speed during driving.To reduce torque requirent in the cycle with change in
the pedal mechanism
Integration of Struts & Spring & Hibernate for Enterprise ApplicationsIJMER
The proposal of this paper is to present Spring Framework which is widely used in
developing enterprise applications. Considering the current state where applications are developed using
the EJB model, Spring Framework assert that ordinary java beans(POJO) can be utilize with minimal
modifications. This modular framework can be used to develop the application faster and can reduce
complexity. This paper will highlight the design overview of Spring Framework along with its features that
have made the framework useful. The integration of multiple frameworks for an E-commerce system has
also been addressed in this paper. This paper also proposes structure for a website based on integration of
Spring, Hibernate and Struts Framework.
Microcontroller Based Automatic Sprinkler Irrigation SystemIJMER
Microcontroller based Automatic Sprinkler System is a new concept of using
intelligence power of embedded technology in the sprinkler irrigation work. Designed system replaces
the conventional manual work involved in sprinkler irrigation to automatic process. Using this system a
farmer is protected against adverse inhuman weather conditions, tedious work of changing over of
sprinkler water pipe lines & risk of accident due to high pressure in the water pipe line. Overall
sprinkler irrigation work is transformed in to a comfortableautomatic work. This system provides
flexibility & accuracy in respect of time set for the operation of a sprinkler water pipe lines. In present
work the author has designed and developed an automatic sprinkler irrigation system which is
controlled and monitored by a microcontroller interfaced with solenoid valves.
On some locally closed sets and spaces in Ideal Topological SpacesIJMER
In this paper we introduce and characterize some new generalized locally closed sets
known as
δ
ˆ
s-locally closed sets and spaces are known as
δ
ˆ
s-normal space and
δ
ˆ
s-connected space and
discussed some of their properties
Intrusion Detection and Forensics based on decision tree and Association rule...IJMER
This paper present an approach based on the combination of, two techniques using
decision tree and Association rule mining for Probe attack detection. This approach proves to be
better than the traditional approach of generating rules for fuzzy expert system by clustering methods.
Association rule mining for selecting the best attributes together and decision tree for identifying the
best parameters together to create the rules for fuzzy expert system. After that rules for fuzzy expert
system are generated using association rule mining and decision trees. Decision trees is generated for
dataset and to find the basic parameters for creating the membership functions of fuzzy inference
system. Membership functions are generated for the probe attack. Based on these rules we have
created the fuzzy inference system that is used as an input to neuro-fuzzy system. Fuzzy inference
system is loaded to neuro-fuzzy toolbox as an input and the final ANFIS structure is generated for
outcome of neuro-fuzzy approach. The experiments and evaluations of the proposed method were
done with NSL-KDD intrusion detection dataset. As the experimental results, the proposed approach
based on the combination of, two techniques using decision tree and Association rule mining
efficiently detected probe attacks. Experimental results shows better results for detecting intrusions as
compared to others existing methods
Natural Language Ambiguity and its Effect on Machine LearningIJMER
"Natural language processing" here refers to the use and ability of systems to process
sentences in a natural language such as English, rather than in a specialized artificial computer
language such as C++. The systems of real interest here are digital computers of the type we think of as
personal computers and mainframes. Of course humans can process natural languages, but for us the
question is whether digital computers can or ever will process natural languages. We have tried to
explore in depth and break down the types of ambiguities persistent throughout the natural languages
and provide an answer to the question “How it affects the machine translation process and thereby
machine learning as whole?” .
Today in era of software industry there is no perfect software framework available for
analysis and software development. Currently there are enormous number of software development
process exists which can be implemented to stabilize the process of developing a software system. But no
perfect system is recognized till yet which can help software developers for opting of best software
development process. This paper present the framework of skillful system combined with Likert scale. With
the help of Likert scale we define a rule based model and delegate some mass score to every process and
develop one tool name as MuxSet which will help the software developers to select an appropriate
development process that may enhance the probability of system success.
Material Parameter and Effect of Thermal Load on Functionally Graded CylindersIJMER
The present study investigates the creep in a thick-walled composite cylinders made
up of aluminum/aluminum alloy matrix and reinforced with silicon carbide particles. The distribution
of SiCp is assumed to be either uniform or decreasing linearly from the inner to the outer radius of
the cylinder. The creep behavior of the cylinder has been described by threshold stress based creep
law with a stress exponent of 5. The composite cylinders are subjected to internal pressure which is
applied gradually and steady state condition of stress is assumed. The creep parameters required to
be used in creep law, are extracted by conducting regression analysis on the available experimental
results. The mathematical models have been developed to describe steady state creep in the composite
cylinder by using von-Mises criterion. Regression analysis is used to obtain the creep parameters
required in the study. The basic equilibrium equation of the cylinder and other constitutive equations
have been solved to obtain creep stresses in the cylinder. The effect of varying particle size, particle
content and temperature on the stresses in the composite cylinder has been analyzed. The study
revealed that the stress distributions in the cylinder do not vary significantly for various combinations
of particle size, particle content and operating temperature except for slight variation observed for
varying particle content. Functionally Graded Materials (FGMs) emerged and led to the development
of superior heat resistant materials.
Energy Audit is the systematic process for finding out the energy conservation
opportunities in industrial processes. The project carried out studies on various energy conservation
measures application in areas like lighting, motors, compressors, transformer, ventilation system etc.
In this investigation, studied the technical aspects of the various measures along with its cost benefit
analysis.
Investigation found that major areas of energy conservation are-
1. Energy efficient lighting schemes.
2. Use of electronic ballast instead of copper ballast.
3. Use of wind ventilators for ventilation.
4. Use of VFD for compressor.
5. Transparent roofing sheets to reduce energy consumption.
So Energy Audit is the only perfect & analyzed way of meeting the Industrial Energy Conservation.
An Implementation of I2C Slave Interface using Verilog HDLIJMER
The focus of this paper is on implementation of Inter Integrated Circuit (I2C) protocol
following slave module for no data loss. In this paper, the principle and the operation of I2C bus protocol
will be introduced. It follows the I2C specification to provide device addressing, read/write operation and
an acknowledgement. The programmable nature of device provide users with the flexibility of configuring
the I2C slave device to any legal slave address to avoid the slave address collision on an I2C bus with
multiple slave devices. This paper demonstrates how I2C Master controller transmits and receives data to
and from the Slave with proper synchronization.
The module is designed in Verilog and simulated in ModelSim. The design is also synthesized in Xilinx
XST 14.1. This module acts as a slave for the microprocessor which can be customized for no data loss.
Discrete Model of Two Predators competing for One PreyIJMER
This paper investigates the dynamical behavior of a discrete model of one prey two
predator systems. The equilibrium points and their stability are analyzed. Time series plots are obtained
for different sets of parameter values. Also bifurcation diagrams are plotted to show dynamical behavior
of the system in selected range of growth parameter
Application of Parabolic Trough Collectorfor Reduction of Pressure Drop in Oi...IJMER
Pipelines are the least expensive and most effective method for the oil transportation.
Due to high viscosity of crude oil, the pressure drop and pumping power requirements are very high.
So it is necessary to bring down the viscosity of crude oil. Heated pipelines are used reduce the oil
viscosity by increasing the oil temperature. Electrical heating and direct flame heating are the common
method used for heating the oil pipeline. In this work, a new application of Parabolic Trough Collector
in the field of oil pipeline transport is introduced for reducing pressure drop in oil pipelines. Oil
pipeline is heated by applying concentrated solar radiation on the pipe surface using a Parabolic
Trough Collector in which the oil pipeline acts as the absorber pipe. 3-D steady state analysis is
carried out on a heated oil pipeline using commercial CFD software package ANSYS Fluent 14.5. In
this work an effort is made to investigate the effect of concentrated solar radiation for reducing
pressure drop in the oil pipeline. The results from the numerical analysis shows that the pressure drop
in oil pipeline is get reduced by heating the pipe line using concentrated solar radiation. From this
work, the application of PTC in oil pipeline transportation is justified.
NO1 Uk best vashikaran specialist in delhi vashikaran baba near me online vas...Amil Baba Dawood bangali
Contact with Dawood Bhai Just call on +92322-6382012 and we'll help you. We'll solve all your problems within 12 to 24 hours and with 101% guarantee and with astrology systematic. If you want to take any personal or professional advice then also you can call us on +92322-6382012 , ONLINE LOVE PROBLEM & Other all types of Daily Life Problem's.Then CALL or WHATSAPP us on +92322-6382012 and Get all these problems solutions here by Amil Baba DAWOOD BANGALI
#vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore#blackmagicformarriage #aamilbaba #kalajadu #kalailam #taweez #wazifaexpert #jadumantar #vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore #blackmagicforlove #blackmagicformarriage #aamilbaba #kalajadu #kalailam #taweez #wazifaexpert #jadumantar #vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore #Amilbabainuk #amilbabainspain #amilbabaindubai #Amilbabainnorway #amilbabainkrachi #amilbabainlahore #amilbabaingujranwalan #amilbabainislamabad
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Final project report on grocery store management system..pdf
The Effect of Cryogenic Treatment on the Hardness, Friction and Wear Resistance of Austenitic Ductile Iron Type D3 Tool Steel
1. International
OPEN ACCESS Journal
Of Modern Engineering Research (IJMER)
| IJMER | ISSN: 2249–6645 | www.ijmer.com | Vol. 4 | Iss.7| July. 2014 | 24|
The Effect of Cryogenic Treatment on the Hardness, Friction and Wear Resistance of Austenitic Ductile Iron Type D3 Tool Steel K. S. Mahesh Lohith1, V. B. Sondur2, V. V. Sondur3 1Research Scholar, Research Center, Maratha Mandal Engineering College, Affiliated to Visvesvaraya Technological University, Belgaum, Karnataka, INDIA, 2 Principal & Director, Research Center, Maratha Mandal Engineering College, Affiliated to Visvesvaraya Technological University Belgaum, Karnataka, INDIA 3 Professors, Research Center, Maratha Mandal Engineering College, Affiliated to Visvesvaraya Technological University Belgaum, Karnataka, INDIA
I. INTRODUCTION
Techniques like heat treatment and coatings are commonly used to improve the wear resistance of some tool steel components [11-15]. The perfect combination of alloying elements and the domain of heat treatment processes confer materials with excellent hardness and wear resistance properties allied to good toughness [15]. As a result of technological advance a great variety of HSS tools are actually available, including coated and powder metallurgy tools. However, cryogenic treatment has emerged as one of the fruitful techniques for the improvement of tribo-mechanical properties of materials [1,2,5,6]. Investigations carried out over the recent four decades have shown interests in low temperature effects and have been demonstrated particularly during heat treatment cycles of tool steels. Initial studies conducted by Barron on various tool steels show a remarkable improvement in tool life and wear resistance. Barron [2] investigated the effect of cryogenic treatment for several materials including the M2 high speed steel at 84ºC. The soaking temperature is maintained at 84 ºC for 24 hours. A significant improvement in wear resistance of cryo-treated steels is observed in sliding abrasion tests when compared to tool steels that are conventionally heat treated, quenched and tempered. The reduction in temperature of the cryogenic treatment further to - 196ºC results in further enhancement in the wear resistance. Literature data indicates that the lives of tools and other steel components increase significantly after being submitted to subzero temperatures. The results are found to be good depending on the application. Improvement in the performance of tool steels from 92% to 817% is observed due to the cryogenic treatment at -196ºC.
Barron [1] attributes the improvement in the wear resistance of tool steels to another mechanism besides the transformation of the retained austenite into martensite. The study verifies that tool steels submitted to conventional heat treatment presented only a small amount of retained austenite. Tool steels submitted to cryogenic treatment show even better performance during machining. Barron, thus, attributes this achievement
Abstract: Investigations carried out in the recent few decades reveal the advantages of cryogenic treatment as one of the promising techniques to enhance wear resistance in certain tool steels. Thus the cryogenic treatment has significant influence on the tribological performance of tool steels. It is a one time permanent treatment process affecting the entire section of the part, unlike coatings. Enhancing the wear resistance and service life of the steel tools subjected to rubbing condition is of important concern. Literature provides information about the investigations performed on some high-speed steels which reveal remarkable improvement in wear resistance from 92% to 817%. Furthermore, the studies conducted on conventional D3 tool steel reveals the betterment of certain tribo-mechanical properties such as hardness and wear resistance. In the present investigation the effect of cryogenic treatment on austenitic ductile iron type D3 tool steel is studied by sliding the test specimen against the same mating material. The study reveals increase in hardness, reduction in friction coefficient and enhancement in wear resistance.
Keywords: Austenitic ductile iron, Cryogenic treatment, Friction, Wear resistance, Vickers hrdness,
D3 tool steel, Pin-on-disc tribometer.
2. The Effect Of Cryogenic Treatment On The Hardness, Friction and Wear Resistance of Austenitic….
| IJMER | ISSN: 2249–6645 | www.ijmer.com | Vol. 4 | Iss.7| July. 2014 | 25|
to transformation of retained austenite to martensite and the presence of both hard and small carbide particles that are well distributed among the larger carbide particles within the martensite matrix. Paulin [3], in his work, verified the presence of fine precipitated carbide particles and their importance related to the material properties. The precipitated carbides reduce internal tension of the martensite and also micro cracks susceptibility is minimized. The uniform distribution of fine carbides of high hardness enhances the wear resistance. Study conducted by Huang and associates [5] also confirms that the cryogenic treatment not only facilitates the carbide formation, it can also make the carbide distribution more homogeneous. The study conducted by Yun [4] verifies changes in the micro-structure of M2 high speed steel when the material is subjected to different cycles of cryogenic treatment at -196 ºC. The results attribute to the transformation of retained austenite into martensite and precipitation of ultra-fine carbides. The effect of deep cryogenic treatment (DCT) on the properties of some tool steels is studied by Molinari and others [6]. The investigation is carried out with both field tests and laboratory tests on real tools. The execution of the deep cryogenic treatment on quenched and tempered high speed steel tools increases hardness, reduces tool consumption and down time for the equipment set up, thus leading to cost reductions of about 50%. The laboratory investigation on an AISI M2 and an AISI H13 steel confirms the effectiveness of DCT followed by conventional heat treatment in increasing the wear resistance and toughness. The mechanical properties such as hardness and wear resistance of the tool and die steel samples treated by conventional tempering and cryogenic quenching with tempering have been evaluated employing Vickers indentation and sliding wear techniques, respectively. The investigation demonstrates deep cryogenic treatment leads to considerable micro-structural changes which results in enhanced tribo-mechanical properties [7]. Study conducted by Dhokey and Nirbhavane [8] describes the effect multiple tempering after cryogenic treatment for D3 tool steel. The hardness, micro structure and wear loss are studied for different kinds of treatments. The treatments are like HT (Hardening and Tempering), HC (Hardening and cryo- treatment), HCT, HCTT, HCTTT (Hardening, cryogenic treatment, tempering and multiple tempering). Wear test is conducted by holding D3 sample pin against the SAE 52100 steel disc of pin on disc tribometer. The study unveils decrease in hardness with multiple tempering of cryo-treated D3 tool steel. The study also reveals the reduction in wear resistance with multiple tempering of the cryo-treated D3 tool steel. The instrumentation for the measurement of tribo-mechanical properties are of many types and the methods of evaluation of the properties are also of various kinds. There are different forms of tribometers used for the evaluation of tribo-mechanical properties and one of the types, advanced reciprocating tribometer, is studied and published by the author as a co-worker [10] . In the current study pin-on-disc tribometer, conforming with ASTM standards, is used for the evaluation of tribo-mechanical properties of the materials.
II. AUSTENITIC DUCTILE IRON TYPE D3 TOOL STEEL
2.1 COMPOSITION In the present work, unlike the D3 tool steel used in the study [8], the material selected for the study is austenitic ductile iron (ADI) type D3 tool steel. The composition of austenitic ductile iron is 2.6% of carbon, 2.5-3.5% of chromium, maximum of 1.0% of manganese, 28.0-32.0% of Ni, maximum of 0.08% of phosphorus, maximum of 1.0-2.8% of silicon and iron being the balance percentage of the structure. 2.2 IMPORTANCE OF AUSTENITIC DUCTILE IRON TYPE TOOL STEELS The study is intended to determine the tribo-mechanical properties of cryo-treated D3 Tool Steel. Since the Pin-On-Disc tribometer could be operated at higher linear speeds when compared to reciprocating tribometer, in the present study an improved version of Pin-On-Disc tribometer with modified pin holding attachment [Fig. 1.] is used to evaluate friction and wear of D3 tool steel. The evaluation of the friction and wear properties is significant and must be done with well defined procedure. Hence The samples are prepared to conform the Pin-On-Disc tribometer specifications.
III. INTRODUCTION TO CRYOGENIC TREATMENT AND ITS
INFLUENCE ON SOME TOOL STEELS
Cryogenic treatment process is not a supplement process for heat treatment. Rather, it is an extension of heat treatment process which would be helpful in obtaining improvement in some of the tribo-mechanical properties for some of the materials. The subzero treatment on metals has been extensively employed for many
3. The Effect Of Cryogenic Treatment On The Hardness, Friction and Wear Resistance of Austenitic….
| IJMER | ISSN: 2249–6645 | www.ijmer.com | Vol. 4 | Iss.7| July. 2014 | 26|
decades for various applications like stabilizing dimensions of precision machined parts and gauges, removal
of internal stresses, improving tool life of cutting tools etc.
When metals are gradually cooled to cryogenic temperatures, soaked for a prolonged period and
allowed to warm to room temperature at a predetermined rate, the lattice structure changes due to stresses
being relieved during cryogenic treatment cycle. In the case of ferrous metals, the soft, ductile, FCC structured
austenite gets converted to strong and harder BCC structured martensite. Apart from this change, a wide
precipitation of newly formed carbides into the hard martensite structure induces a dense lattice structure [1,3].
Earlier studies have revealed the fact of newly precipitated carbide particles are largely responsible for
the increase in wear resistance characteristics by the process, due to, a denser, uniform and fine micro
structure. This results in larger surface area of contact between the tool and metal which reduces friction, heat
and wear. Obvious changes have been found in the improvement of tool life of high-speed tool steels.
IV. SAMPLE PREPARATION AND THE PROCESS OF CRYOGENIC TREATMENT
4.1 SAMPLE PREPARATION AND THE PROCESS OF CRYOGENIC TREATMENT
The study is intended to determine the tribo-mechanical properties of cryo-treated D3 Tool Steel.
Since the Pin-On-Disc tribometer could be operated at higher linear speeds when compared to reciprocating
tribometer, in the present study an improved version of Pin-On-Disc tribometer [Fig. 2.] with modified pin
holding attachment [Fig. 1.] is used to evaluate friction and wear of D3 tool steel. The evaluation of the friction
and wear properties is significant and must be done with well defined procedure. Hence The samples are
prepared to conform the Pin-On-Disc tribometer specifications.
Figure 1. Modified pin holding attachment Figure. 2. Pin-On-Disc Tribometer
4.2 PREPARATION OF MATERIAL SAMPLES FOR TRIBOLOGY TESTS
It is of interest to test some of the mechanical properties of the selected material. In order to conduct
the wear resistance test on the wear testing rig: A disc of D3 tool steel of diameter 110mm having a thickness
of 8.1 mm is required. The surface finish of 0.24 micrometer is required for the disc which is accomplished by
surface grinding operation. The disc has a central hole of 8.5mm in diameter and an eccentric hole of 4mm in
diameter at a distance 11.25mm from the center of the disc. The pins required for wear testing are obtained by
cutting and finishing a rod of length 300mm and diameter of 6mm. The length of each pin is 25mm. Square
slabs of dimension 50mmx50mmx10mm are fabricated for hardness tests.
4.3 CRYOGENIC TREATMENT FOR THE TEST SAMPLES
Fabricated samples are categorized into two different batches. One batch is taken through a cycle of
cryogenic treatment. The hardness specimen, specimen pins and specimen discs are placed inside the
cryogenic system Fig. 4. The cryogenic processor system is provided with a container in which liquid nitrogen
gets filled. Initially, during the cryo-treatment, the container temperature is maintained at room temperature of
300K. The temperature of the system is gradually reduced to the soaking temperature of 98 K with a cooling
rate of 0.417 K/min. This takes about 8 hours to attain the temperature 98 K. The cooling is controlled by a
data acquisition system which regulates the liquid flow through the solenoid valve. If the rate of fall in
temperature is quick compared to the preset value then the the flow of the liquid nitrogen is stopped so that the
temperature drop is maintained at preset value. The amount of liquid required for attaining this temperature is
about 250 litre.
4. The Effect Of Cryogenic Treatment On The Hardness, Friction and Wear Resistance of Austenitic….
| IJMER | ISSN: 2249–6645 | www.ijmer.com | Vol. 4 | Iss.7| July. 2014 | 27|
Figure.3. Cryogenic treatment cycle Figure. 4. Schematic Diagram of cryo-processor Once the specimens are cooled to a temperature of 98 K the temperature is maintained constant for a period of 24 hours [9]. In order to hold the temperature constant for a period of 24 hours it takes about 450 litre of liquid nitrogen. The beneficial changes of the cryogenic treatment occur during this phase of the treatment. After the 24 hours the system is allowed to gradually heat to the room temperature. The warming at rate 2.4 minK and hence it takes 8 hours for the specimens to attain the room temperature 300K Fig. 3.
V. EXPERIMENTS
The Untreated and cryo-treated samples are fabricated as per the required standards for the Vickers hardness test and conforming to the specifications of the Pin-On-Disc tribometer designed as per ASTM standards.
5.1 DETERMINATION OF VICKERS HARDNESS FOR D3 TOOL STEEL
Hardness measurement is done for both untreated and cryo-treated test specimen. Vickers hardness measurement technique is used to determine the hardness of the selected material specimens. The hardness is determined by taking average of six readings. The average Vickers pyramid number (HV) or Diamond pyramid hardness (DPH) determined using Vickers indentation method is given in the Table. 1.
Sample
F (kg wt)
d(mm)
HV
Untreated
20
0.411
220
Cryo-treated
20
0.379
258
Table. 1. HV – Untreated and Cryo-treated austenitic ductile iron type D3 tool steel.
5.2 FRICTION AND WEAR TESTS
Specifications of the Pin-On-Disc tribometer used for the tribo-mechanical tests are as described below. The loading capacity is from 5N to 250N having the resolution of 1N. The maximum friction force of 100N can be measured with 1N resolution Fig. 2. The resolution of linear variable differential transformer (LVDT) is 1 micron. The Pin-On-Disc tribometer is calibrated using standard specimen for which the tribo- mechanical properties are well defined. Experiments are conducted by sliding D3 pin against D3 Disc, for both untreated and cryo-treated samples, using Pin-On-Disc Tribometer. The idea of making the pin and disc of same material is to study the effect of cryogenic treatment on the material when it is under rubbing condition with identical material. Friction and wear tests were first conducted for untreated D3 pin sliding against untreated D3 disc. In the later part of the experiments friction and wear tests were conducted for the cryo- treated D3 pin sliding against cryo-treated D3 disc. Friction and LVDT Displacement were acquired using data acquisition system for a constant load of 40N and keeping the sliding distance same 1000m. The experiments were conducted for two different sliding speeds of the D3 disc 1m/s and 5m/s. During the tribo-mechanical tests wear debris is not removed from the surface of the disc to simulate practical real time sliding environment.
5. The Effect Of Cryogenic Treatment On The Hardness, Friction and Wear Resistance of Austenitic….
| IJMER | ISSN: 2249–6645 | www.ijmer.com | Vol. 4 | Iss.7| July. 2014 | 28|
VI. RESULTS AND DISCUSSION
Vickers hardness measurements are done with six trials and an average value is obtained. The average
of the HV is 221 before cryo-treatment. The average of the HV is 258 after cryo-treatment. The results show
enhancement by 17% after cryo-treatment. It is evident from the present study that there is appreciable
increase in the hardness of the material as a result of cryo-treatment. This is attributed to the transformation
from retained austenite to martensite and the formation of carbide particles.
The comparison of co-efficient of friction between untreated and cryo-treated samples conclude the
betterment of the performance of the material with lower friction after cryo-treatment. The plots in Fig. 5.
reveal the lowering of friction after cryo-treatment, for the sliding speeds 1m/s and 5m/s.
The fluctuations in the values of co-efficient of friction were observed during the experimentation and
is due to the lumps of wear particles formed during the three body abrasive wear. It is evident from the visual
inspection and the plots that the wear particle size is comparatively high in case of lower speed 1m/s than
higher speed 5 m/s
Fig. 5. Variation of friction as a function of sliding distance for linear speeds 1m/s and 5 m/s
Plots of displacement measured by linear variable differential transformer (LVDT) as a function of
sliding distance for linear speeds 1m/s and 5m/s are made for both untreated and cryo-treated samples. The
plots are as shown in Fig. 6. The plots show appreciable increase in the wear resistance of D3 steel after cryo-treatment
The percentage change in LVDT displacement per kilometer sliding is calculated from trend lines
(least square fit). Even though the LVDT displacement does not exactly bring out the precise value of linear
wear it represents a value proportional to linear wear since the normal load is constant.
Figure. 6. LVDT displacement function of sliding distance for linear speeds 1m/s and 5 m/s
6. The Effect Of Cryogenic Treatment On The Hardness, Friction and Wear Resistance of Austenitic….
| IJMER | ISSN: 2249–6645 | www.ijmer.com | Vol. 4 | Iss.7| July. 2014 | 29|
Wear resistance enhancement in cryo-treated specimen is found to be better by 40% for linear speed 1m/s in comparison with untreated specimen for the same linear speed. Similar plot for the linear speed of 5m/s is made and the plot reveals enhancement in wear resistance better by 80% for cryo-treated specimen in comparison with untreated specimen for the same linear speed.
VII. CONCLUSION
The current investigation reveals the effect of cryo-treatment on austenitic Ductile Iron type D3 Tool steel in terms of increase in hardness and enhancement in the the wear resistance of the material. The cryo- treated samples wear out slowly when compared to untreated samples confirming the enhancement in wear resistance there by increasing the tool life. The increase in hardness makes the material better with regard to mechanical properties. The investigation also confirms cryo-treatment as an efficient onetime process to reduce wear in the austenitic ductile iron type D3 tool steel. The Cryogenic treatment leads to an appreciable increase in wear resistance of the material. It is found that the percentage change in wear is lower for higher speeds thus leading to dependence of wear resistance on speed. The lumps of wear particles formed suggest the initial adhesive wear. Furthermore the wear debris indulge in three body abrasive wear. It can be concluded that the coefficient of friction decreases when austenitic ductile iron type D3 tool Steel is cryo-treated.
ACKNOWLEDGEMENTS
Authors express gratitude to Dr. Krishna Venkatesh, CEO, Center for Emerging Technologies, Jain University, for the provision of Pin-On-Disc tribometer The authors thank Mr. Govindaraju of Magnum Industries, Peenya Industrial Area, Bangalore, for the material samples and fabrication. Authors also thank Mr Suresh Nadig, Indian Institute of Science, Bangalore for the Cryogenic treatment of material samples.
REFERENCES
JOURNAL PAPERS:
[1] Barron F. R., Yes cryogenic treatments can save you money here is why, Tapi, 57(5), 1974, 35-40. [2] Barron R. F., Cryogenic treatment of metals to improve the wear resistance, Cryogenics 409-413, 1982. [3] Paulin P., Frozen gears, Gear Technol 26-28, 1993. [4] Yun D., Xiaoping L., Hongshen X., Deep cryogenic treatment of high speed steel and its mechanism, Heat Treat. Met. 55-59, 1998. [5] Huang JY, Zhu YT, Liao XZ, Beyerlein IJ, Bourke MA, Mitchell TE. Microstructure of cryogenic treated M2 tool steel. Materials Science and Engineering, A339 241(4), 2003. [6] Molinari A., Pellizzari M., Gialanella S., Straffelini S., Stiasny K. H., Effect of Deep cryogenic treatment on the mechanical properties of tool steels, J. Mater. Process.technol. 118, 2001, 350-355. [7] Mohan Lal D., Renganarayanan S., Kalanidhi A., Cryogenic treatment to augment wear resistance of tool and die steels, Cryogenics, 41, 149-155, 2001, 149-155 . [8] Dhokey N. B., Nirbhavane S., Dry sliding wear of cryo-treated multiple tempered D-3 tool steel, Journal of Materials Processing Technology ,209(3), 2009, 1484-1490. [9] Gopal Krishna P. V., Kishore K., Ramadevudu G., Sikandar Ali, Performance evaluation of cryogenic treated tools in turning, Advances in Production Engineering & Management, 3, 2012, 187-194 . [10] Mohan C. B., Divakar C., Venkatesh K., Gopalakrishna K., Mahesh Lohith K. S., Naveen T. N., Design and development of an linear reciprocating tribometer, Wear, 267, 2009, 1111-1116. [11] Garcia I., Fransaer J., Celis J.P, Electro-deposition and sliding wear resistance of nickel composite coatings containing micron and sub-micron SiC particles Surface and Coatings Technology, 148, 2001, 171-178. [12] Yuji Chibaa, Toshio Omuraa and Hiroshi Ichimuraa, Wear resistance of arc ion-plated chromium nitride coatings, Journal of Materials Research, 8, 1993, 1109-1115. [13] Dutta Majumdar J., Galun R., Mordike B. L., Manna I., Effect of laser surface melting on corrosion and wear resistance of a commercial magnesium alloy, Materials Science and Engineering, A361, 2003, 119-129. [14] Sun Y., Li X., Bell T., Low temperature plasma carburising of austenitic stainless steels for improved wear and corrosion resistance, Surface Engineering 15(1), 1999, 49-54.
[15] Feng B., Weng J., Qu S. X., Leng Y. X., Zhou Z. R., Improving wear resistance by heat treatment in different atmospheres, key engineering Materials, 288-289, 2005, 641-644.