In the modern world of industrialization the wear is eating metal assets worth millions of dollars per year. The wear is in the form of corrosion, erosion, abrasion etc. which occur in the process industries like oil & gas, refineries, cement plants, steel plants, shipping and offshore working structures. The equipments like pressure vessels, heat exchangers, hydro processing reactors which very often work at elevated temperatures face corrosion in the internal diameter. Duplex 2209 weld overlay on ferrous material is developed for high corrosion resistance properties and having high productivity by Electroslag strip cladding process due to its less dilution ~10% as compared to SMAW , GTAW or FCAW process. Because of Low Dilution ~10% undiluted chemistry can be achieved with single layer as compared to other weld overlay processes. The facility was developed inhouse to carry out weld overlay by ESSC and Testing.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Experimental study on corrosion prevention with rebars along with fibre in r ...eSAT Journals
Abstract All materials or products, plants, constructions and building made of structural elements are subjected to physical wear during
use. Corrosion is a multi- billion dollar problem. Corrosion causes deterioration of material and leads to destruction of
structures ultimately affects the environment. Corrosion is a chemical or electrochemical phenomenon which can attack any metal
or substances through reaction by the surrounding environment. The second is conservation, applied primarily to metal
resources, the world’s supply of which is limited. The project is aimed at preventing corrosion that is minimising the rate of
corrosion using polypropylene fibre and epoxy coating. In this work an attempt is planned to study the effects of fibres in concrete
and to study the coating provided to the reinforcement. To accelerate the corrosion for a short term process of impressed current
is induced. In this project it is aimed to study the effect of coating given to the reinforcement and effect of adding fibre in the
concrete.
Keywords: Fibre, Compressive Strength, Flexural Strength.
Effects of Continuous Cooling On Impact and Micro Structural Properties of Lo...IJMER
Some mechanical properties and microstructural analysis were conducted on shielded
metal arc weldments of low carbon steels in some simulated environments. Specimens were prepared
and subjected to welding and continuous cooling at the same time at various positions. Results obtained
for impact strength using Charpy impact testing machine showed that impact strength of water cooled
samples were higher compared to salty water cooled samples. This is due to the increased formation of
martensitic structure and finer pearlite grains. The microstructure of the samples was studied using
photographic visual metallurgical microscope. For low cooling rate as in the air cooled sample, the
austenite was observed to transform into ferrite and pearlite. Ferrite is a body-centred cubic crystal
structure of iron alloys. For higher cooling rates of water and salt water cooled samples, low
temperature transformation products like bainite (an acicular microstructure which is not a phase) or
martensite (a very hard form of steel crystalline structure) were formed. The salt water cooled samples
had more martensite regions because of the increased cooling rate
Effect of silicon carbide percentage on fracture toughness of aluminium silio...eSAT Journals
Abstract Metal matrix composites are composites in which one component will be a metal and other metal or non metal. It has wide applications in various fields like automobile, turbines blades etc which needs good mechanical properties. This thesis work studies about Aluminium Silicon Carbide metal matrix composites and their properties. Earlier studies revealed that as the percentage of Silicon Carbide is increased the properties get increased up to a limit and fracture toughness gets reduced beyond that. Here, in this work different percentage of SiC is added and fracture toughness is analyzed in terms of Stress intensity factor since fracture toughness cannot be calculated directly. Both software simulation and experimental methods has been done to find out the best percentage composition. Keywords: Metal matrix composites, Aluminium Silicon Carbide, Fracture Toughness, Stress Intensity Factor
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Experimental study on corrosion prevention with rebars along with fibre in r ...eSAT Journals
Abstract All materials or products, plants, constructions and building made of structural elements are subjected to physical wear during
use. Corrosion is a multi- billion dollar problem. Corrosion causes deterioration of material and leads to destruction of
structures ultimately affects the environment. Corrosion is a chemical or electrochemical phenomenon which can attack any metal
or substances through reaction by the surrounding environment. The second is conservation, applied primarily to metal
resources, the world’s supply of which is limited. The project is aimed at preventing corrosion that is minimising the rate of
corrosion using polypropylene fibre and epoxy coating. In this work an attempt is planned to study the effects of fibres in concrete
and to study the coating provided to the reinforcement. To accelerate the corrosion for a short term process of impressed current
is induced. In this project it is aimed to study the effect of coating given to the reinforcement and effect of adding fibre in the
concrete.
Keywords: Fibre, Compressive Strength, Flexural Strength.
Effects of Continuous Cooling On Impact and Micro Structural Properties of Lo...IJMER
Some mechanical properties and microstructural analysis were conducted on shielded
metal arc weldments of low carbon steels in some simulated environments. Specimens were prepared
and subjected to welding and continuous cooling at the same time at various positions. Results obtained
for impact strength using Charpy impact testing machine showed that impact strength of water cooled
samples were higher compared to salty water cooled samples. This is due to the increased formation of
martensitic structure and finer pearlite grains. The microstructure of the samples was studied using
photographic visual metallurgical microscope. For low cooling rate as in the air cooled sample, the
austenite was observed to transform into ferrite and pearlite. Ferrite is a body-centred cubic crystal
structure of iron alloys. For higher cooling rates of water and salt water cooled samples, low
temperature transformation products like bainite (an acicular microstructure which is not a phase) or
martensite (a very hard form of steel crystalline structure) were formed. The salt water cooled samples
had more martensite regions because of the increased cooling rate
Effect of silicon carbide percentage on fracture toughness of aluminium silio...eSAT Journals
Abstract Metal matrix composites are composites in which one component will be a metal and other metal or non metal. It has wide applications in various fields like automobile, turbines blades etc which needs good mechanical properties. This thesis work studies about Aluminium Silicon Carbide metal matrix composites and their properties. Earlier studies revealed that as the percentage of Silicon Carbide is increased the properties get increased up to a limit and fracture toughness gets reduced beyond that. Here, in this work different percentage of SiC is added and fracture toughness is analyzed in terms of Stress intensity factor since fracture toughness cannot be calculated directly. Both software simulation and experimental methods has been done to find out the best percentage composition. Keywords: Metal matrix composites, Aluminium Silicon Carbide, Fracture Toughness, Stress Intensity Factor
The main objective of this project is to be produce copper reinforced metal matrix composite (MMC) layers using micron sized AlN particles via friction stir processing (FSP) in order to enhance surface mechanical properties. Micro structural evaluation using Optical Microscopy (OM) and Scanning Electron Microscopy (SEM) indicated that an increase in traverse speed and a decrease in rotational speed cause a reduction in the grain size of different groove width (0,0.4,0.8,1.2 mm) of stir zone (SZ) for the specimens friction stir processed (FSPed) without AlN particles. It was found that upon addition of AlN particles, wear properties were improved. This behavior was further supported by SEM images of wear surfaces. Results demonstrated that the micro composite produced by FSP exhibited enhanced wear resistance and higher average friction coefficient in comparison with pure copper. Tensile properties and fracture characteristics of the specimens FSPed with and without AlN particles and pure copper were also evaluated. According to the results, the MMC layer produced by FSP showed higher strength and lower elongation than pure copper while a remarkable elongation was observed for FSPed specimen without AlN particles and been greatly developed by the use of AlN.
Analysis of mechanical properties of heat treated mild steelSaugata Chowdhury
The aim of this project was to make a comparison between the changes in mechanical properties of mild steel quenched in various quenching mediums namely Vegetable oil, Brine solution, NaOH solution and Super-quenchant. Mild-Steel specimens for hardness test, tensile test and impact test were prepared and heated upto the austenizing range of temperature. After holding at that temperature for the necessary sintering time, they were immediately quenched in the four mediums.
Upon carrying the various tests, it was observed that hardness of all the specimens increased at the expense of toughness. Further the rate of cooling influenced the hardness of the specimens. Specimens quenched in NaOH exhibited maximum increase in hardness and tensile strength of steel. Oil quenched steel showed rise in hardness and tensile strength with least decrease in toughness among the four mediums. Brine also improved the hardness and tensile strength but maximum reduction in toughness was encountered. Finally, superquenchant was found to be the best quenching medium with appreciable rise in the hardness and tensile strength at very less reduction in toughness.
Fundamentals, synthesis and applications of Al2O3-ZrO2 compositesTANDRA MOHANTA
When the word “Ceramic” comes to our mind, we usually associate them with plates, saucers, cups and mugs. But, the word “Ceramic” encompasses more than just the word “plates” or “saucers”. Indeed, ceramic materials are hard and inherently brittle, but this is just the tip of the iceberg. They have multifarious properties and have acquired a status of high technical importance in the field of scientific research. Ceramics are the soul of the modern day’s structural applications owing to their high mechanical and thermal stability under different challenging conditions. They exhibit remarkable properties such as high hardness, high wear resistance, high corrosion resistance, high elastic modulus, high melting point and the ability to retain high strength at elevated temperatures. Alumina (Al2O3) is one such remarkable ceramic material known for its unique optical, mechanical and electrical properties. But the brittle nature of Al2O3 limits its use in certain engineering applications. Therefore, the strength of Al2O3 and Al2O3- based ceramics can be enhanced by tailoring the microstructural design through the application of strategic techniques that may involve secondary phase particle inclusion (such as Zirconia, ZrO2)
In this work, effect of welding electrode, welding current and corrosion media on
corrosion behaviour of three kinds of stainless steel (AISI 304, AISI 316 and AISI 410)
was investigated. Welding was performed by manual metal arc welding process using
three types of welding electrode (E308L, E316L and E310). Corrosion behaviour of
the welded joints was examined in two chloride mediums (3.5%NaCl and 3.5%KCl).
The results showed that welding electrodes E316L and E310, which contain Mo and
Ni respectively, increase corrosion resistance in of the weldment. The increment in
heat input by increasing welding current caused reduction in corrosion resistance by
facilitating carbon diffusion and formation of chromium carbides in the weld area. It
was also found that corrosion rate of 3.5% NaCl was more aggressive than 3.5% KCl.
Dissimilar Metal Welding - Issues, Solution & TechniquesVarun K M
Factors to be considered while welding dissimilar metals.
What are the issues faced?
What are different solutions and techniques to overcome this issues ?
The presentation also contain some case case studies to get a better understanding.
Study of Wear Behavior of Aluminum based MMCs using Taguchi MethodsRSIS International
composite material is a material system composed of a mixture or combination of two or more micro or macro constituents that differ in form and chemical composition and which are essentially insoluble in each other. Stir casting method is used to fabricate Metal Matrix composites (MMCs) having fly ash in 3, 6, 9 wt% and e-glass fibre in 3 wt%. The dry sliding wear tests were conducted on composite material using a pin-on-disc wear testing setup with a normal pin load of 20N, 40N and 60N, and wear rate for each load is calculated for different sliding speeds. Analytical modelling of composite material is carried out by Taguchi’s design of experiments (DOE) using L27 orthogonal array. The experimental results were transformed into a signal-to-noise (S/N) ratios. Analysis of Variance (ANOVA) was used to determine the design parameters significantly influencing the wear rate of the composite material. Based on the experimental results, a multiple linear regression model was developed. A regression equation thus generated establishes correlation between the significant terms obtained from ANOVA, namely, load, sliding speed, fly ash content and their interactions. In order to validate the regression model, confirmation wear tests were conducted with parameter levels that were different from those used for analysis. The error associated with the relationship between the experimental values and the computed values of the regression model for hybrid composites was around ±5%.
A Overview on Effect of Reinforcement and Process Parameters on Properties of...IJRES Journal
Aluminum alloys are widely used in aerospace and automobile industries due totheir low density and good mechanical properties,bettercorrosionresistanceandwear resistance,lowthermalcoefficientof expansion as comparedto conventionalmetals and alloys. Theexcellent mechanicalpropertiesofthesematerialsandrelativelylowproductioncostmakethema very attractive candidate for a variety of applications both from scientific and technological viewpoints. Inthispaperanattempt hasbeenmadetoprovide a literaturereviewon theoverallperformanceofreinforcedcompositesfabricatedbystircasting method and effect of process parameters on properties of Aluminium based MMC.Theliteraturereviewframework inthispaper providesa clearoverviewthat the process parameters play important role for optimum properties of Aluminium based Metal Matrix Composites.
Defects, Root Causes in Casting Process and Their Remedies: ReviewIJERA Editor
Many industry aims to improve quality as well as productivity of manufacturing product. So need to number of process parameter to must controlled while casting process, so there are no of uncertainty and defects are face by organizations. In casting process industries are need to technical solution to minimize the uncertainty and defects. In this review paper to represent various casting defects and root causes for engine parts while casting process. Also provide preventive action to improve quality as well as productivity an industrial level.
Some common Fixed Point Theorems for compatible - contractions in G-metric ...IJERA Editor
We prove some common fixed point theorems for compatible self mappings satisfying some kind of contractive type conditions on complete G-metric spaces and obtain results of Kumara Swamy and Phaneendra[6] and Sushanta Kumar Mohanta[16] as corollaries. 2010 Mathematics Subject Classification.47H10, 54H25
The main objective of this project is to be produce copper reinforced metal matrix composite (MMC) layers using micron sized AlN particles via friction stir processing (FSP) in order to enhance surface mechanical properties. Micro structural evaluation using Optical Microscopy (OM) and Scanning Electron Microscopy (SEM) indicated that an increase in traverse speed and a decrease in rotational speed cause a reduction in the grain size of different groove width (0,0.4,0.8,1.2 mm) of stir zone (SZ) for the specimens friction stir processed (FSPed) without AlN particles. It was found that upon addition of AlN particles, wear properties were improved. This behavior was further supported by SEM images of wear surfaces. Results demonstrated that the micro composite produced by FSP exhibited enhanced wear resistance and higher average friction coefficient in comparison with pure copper. Tensile properties and fracture characteristics of the specimens FSPed with and without AlN particles and pure copper were also evaluated. According to the results, the MMC layer produced by FSP showed higher strength and lower elongation than pure copper while a remarkable elongation was observed for FSPed specimen without AlN particles and been greatly developed by the use of AlN.
Analysis of mechanical properties of heat treated mild steelSaugata Chowdhury
The aim of this project was to make a comparison between the changes in mechanical properties of mild steel quenched in various quenching mediums namely Vegetable oil, Brine solution, NaOH solution and Super-quenchant. Mild-Steel specimens for hardness test, tensile test and impact test were prepared and heated upto the austenizing range of temperature. After holding at that temperature for the necessary sintering time, they were immediately quenched in the four mediums.
Upon carrying the various tests, it was observed that hardness of all the specimens increased at the expense of toughness. Further the rate of cooling influenced the hardness of the specimens. Specimens quenched in NaOH exhibited maximum increase in hardness and tensile strength of steel. Oil quenched steel showed rise in hardness and tensile strength with least decrease in toughness among the four mediums. Brine also improved the hardness and tensile strength but maximum reduction in toughness was encountered. Finally, superquenchant was found to be the best quenching medium with appreciable rise in the hardness and tensile strength at very less reduction in toughness.
Fundamentals, synthesis and applications of Al2O3-ZrO2 compositesTANDRA MOHANTA
When the word “Ceramic” comes to our mind, we usually associate them with plates, saucers, cups and mugs. But, the word “Ceramic” encompasses more than just the word “plates” or “saucers”. Indeed, ceramic materials are hard and inherently brittle, but this is just the tip of the iceberg. They have multifarious properties and have acquired a status of high technical importance in the field of scientific research. Ceramics are the soul of the modern day’s structural applications owing to their high mechanical and thermal stability under different challenging conditions. They exhibit remarkable properties such as high hardness, high wear resistance, high corrosion resistance, high elastic modulus, high melting point and the ability to retain high strength at elevated temperatures. Alumina (Al2O3) is one such remarkable ceramic material known for its unique optical, mechanical and electrical properties. But the brittle nature of Al2O3 limits its use in certain engineering applications. Therefore, the strength of Al2O3 and Al2O3- based ceramics can be enhanced by tailoring the microstructural design through the application of strategic techniques that may involve secondary phase particle inclusion (such as Zirconia, ZrO2)
In this work, effect of welding electrode, welding current and corrosion media on
corrosion behaviour of three kinds of stainless steel (AISI 304, AISI 316 and AISI 410)
was investigated. Welding was performed by manual metal arc welding process using
three types of welding electrode (E308L, E316L and E310). Corrosion behaviour of
the welded joints was examined in two chloride mediums (3.5%NaCl and 3.5%KCl).
The results showed that welding electrodes E316L and E310, which contain Mo and
Ni respectively, increase corrosion resistance in of the weldment. The increment in
heat input by increasing welding current caused reduction in corrosion resistance by
facilitating carbon diffusion and formation of chromium carbides in the weld area. It
was also found that corrosion rate of 3.5% NaCl was more aggressive than 3.5% KCl.
Dissimilar Metal Welding - Issues, Solution & TechniquesVarun K M
Factors to be considered while welding dissimilar metals.
What are the issues faced?
What are different solutions and techniques to overcome this issues ?
The presentation also contain some case case studies to get a better understanding.
Study of Wear Behavior of Aluminum based MMCs using Taguchi MethodsRSIS International
composite material is a material system composed of a mixture or combination of two or more micro or macro constituents that differ in form and chemical composition and which are essentially insoluble in each other. Stir casting method is used to fabricate Metal Matrix composites (MMCs) having fly ash in 3, 6, 9 wt% and e-glass fibre in 3 wt%. The dry sliding wear tests were conducted on composite material using a pin-on-disc wear testing setup with a normal pin load of 20N, 40N and 60N, and wear rate for each load is calculated for different sliding speeds. Analytical modelling of composite material is carried out by Taguchi’s design of experiments (DOE) using L27 orthogonal array. The experimental results were transformed into a signal-to-noise (S/N) ratios. Analysis of Variance (ANOVA) was used to determine the design parameters significantly influencing the wear rate of the composite material. Based on the experimental results, a multiple linear regression model was developed. A regression equation thus generated establishes correlation between the significant terms obtained from ANOVA, namely, load, sliding speed, fly ash content and their interactions. In order to validate the regression model, confirmation wear tests were conducted with parameter levels that were different from those used for analysis. The error associated with the relationship between the experimental values and the computed values of the regression model for hybrid composites was around ±5%.
A Overview on Effect of Reinforcement and Process Parameters on Properties of...IJRES Journal
Aluminum alloys are widely used in aerospace and automobile industries due totheir low density and good mechanical properties,bettercorrosionresistanceandwear resistance,lowthermalcoefficientof expansion as comparedto conventionalmetals and alloys. Theexcellent mechanicalpropertiesofthesematerialsandrelativelylowproductioncostmakethema very attractive candidate for a variety of applications both from scientific and technological viewpoints. Inthispaperanattempt hasbeenmadetoprovide a literaturereviewon theoverallperformanceofreinforcedcompositesfabricatedbystircasting method and effect of process parameters on properties of Aluminium based MMC.Theliteraturereviewframework inthispaper providesa clearoverviewthat the process parameters play important role for optimum properties of Aluminium based Metal Matrix Composites.
Defects, Root Causes in Casting Process and Their Remedies: ReviewIJERA Editor
Many industry aims to improve quality as well as productivity of manufacturing product. So need to number of process parameter to must controlled while casting process, so there are no of uncertainty and defects are face by organizations. In casting process industries are need to technical solution to minimize the uncertainty and defects. In this review paper to represent various casting defects and root causes for engine parts while casting process. Also provide preventive action to improve quality as well as productivity an industrial level.
Some common Fixed Point Theorems for compatible - contractions in G-metric ...IJERA Editor
We prove some common fixed point theorems for compatible self mappings satisfying some kind of contractive type conditions on complete G-metric spaces and obtain results of Kumara Swamy and Phaneendra[6] and Sushanta Kumar Mohanta[16] as corollaries. 2010 Mathematics Subject Classification.47H10, 54H25
A Proposed Method for Safe Disposal of Consumed Photovoltaic ModulesIJERA Editor
The growth of domestic and large-scale applications of solar energy, especially photovoltaic (PV) cells which reaches annually up to 40 % worldwide since 2000, means that the technology has stepped out from demonstration phase to large-scale deployment. Several countries have started to exploit this huge potential as part of their future energy supply. Photovoltaic cells are manufactured from various semiconductors; materials that are moderately good conductors for electricity but harmful to the environment. End-of-life disposal of PV modules can be an environmental issue. However, due to the long lifespan of PV modules (25 to 30 years), currently most PV modules have not reached the disposal stage. As a result, there is very little experience and knowledge with the disposal and/or recycling techniques of PV modules. This paper proposes a method for safe disposal of solar panels after the end of their life by burying the PV cells into concrete blocks that may be used in different civil applications. Two types of PV cells (mono-crystalline & multi-crystalline) are selected to be mixed with concrete components to investigate their effect on properties of concrete. The experimental results showed that the PV cells have an effect on the concrete properties. Reduction of concrete compressive strength and density, while an increase in the concrete porosity were observed. In General, this study showed the validity of the proposed method to be further investigated for safe disposal of consumed photovoltaic modules
POWER CONSUMING SYSTEM USING WSN IN HEMSIJERA Editor
Today’s buildings account for a large fraction of our energy consumption. In an effort to economize scarce fossil fuels on earth, sensor networks are a valuable tool to increase the energy efficiency of buildings without severely reducing our quality of life. Within a smart building many sensors and actuators are interconnected to form a control system. Nowadays, the deployment of a building control system is complicated because of different communication standards. Here we present a web services-based approach to integrate resource constrained sensor and actuator nodes into IP-based networks. A key feature of our approach is its capability for automatic service discovery. The design and development of an intelligent monitoring and controlling system for home appliances in a real time system is reported in this paper. This system principally monitors the electrical parameters such as voltage and current and subsequently calculates the power consumption of the home appliances that are need to be monitored. The innovation of this system is controlling mechanism implementation in so many ways. Also the proposed system is an economical and easily operable. Due to these intelligent characteristics it become an electricity expense reducer and people friendly.
“Design and Analysis of a Windmill Blade in Windmill Electric Generation System”IJERA Editor
Wind turbine is a standout amongst the most imperative wellsprings of renewable vitality. Wind turbine extricate active vitality from the wind. A little wind turbine cutting edge was composed and examined in this work. The power execution of little flat hub wind turbines was mimicked in detail utilizing altered blade element momentum methods (BEM). Another sharp edge was planned utilizing diverse assault points (i.e.0o , 5o , 10o ), distinctive speed (4m/s, 5m/s and 12m/s) and rotor span (0.5m and 1m). From this we discover harmony length and power yield hypothetically. Likewise, we chose material for proposed sharp edge.
Empirical Study of a Key Authentication Scheme in Public Key CryptographyIJERA Editor
Public key cryptosystem plays major role in many online business applications. In public key cryptosystem, public key need not be protected for confidentiality, but the authenticity of public key is needed. Earlier, many key authentication schemes are developed based on discrete logarithms. Each scheme has its own drawbacks. We developed a secure key authentication scheme based on discrete logarithms to avoid the drawbacks of earlier schemes. In this paper, we illustrate the empirical study to show the experimental proof of our scheme.
Topology Management for Mobile Ad Hoc Networks ScenarioIJERA Editor
Cooperative communication is the main accessing point in present days. These results can be accessed through proactive protocol like route request packet sending and route request packet receiving. The main issue is how communication will be done in MANETS. Mobile Ad-hoc networks are self-configurable networks; each node behaves like server and client in MANET. COCO (Capacity Optimized Cooperative Communication) model was developed for accessing these types of resources in MANETs. This model can’t provide sufficient communication or overall network performance. This model provides sufficient capability improvement in mobile ad-hoc networks, but this model will be taking more power resources for doing this work. exploitation simulation examples, we have a tendency to show that physical layer cooperative communications have important impacts on the performance of topology control and network capability, and also the proposed topology management scheme will considerably improve the network capability in MANETs with cooperative communications
Direction of Arrival Estimation Based on MUSIC Algorithm Using Uniform and No...IJERA Editor
In signal processing, the direction of arrival (DOA) estimation denotes the direction from which a propagating wave arrives at a point, where a set of antennas is located. Using the array antenna has an advantage over the single antenna in achieving an improved performance by applying Multiple Signal Classification (MUSIC) algorithm. This paper focuses on estimating the DOA using uniform linear array (ULA) and non-uniform linear array (NLA)of antennas to analyze the performance factors that affect the accuracy and resolution of the system based on MUSIC algorithm. The direction of arrival estimation is simulated on a MATLAB platform with a set of input parameters such as array elements, signal to noise ratio, number of snapshots and number of signal sources. An extensive simulation has been conducted and the results show that the NLA with DOA estimation for co-prime array can achieve an accurate and efficient DOA estimation
Performance Evaluation of Two-Level Photovoltaic Voltage Source Inverter Cons...IJERA Editor
The switching control schemesincluding sinusoidal pulsewidth modulation (SPWM) and space vector modulation (SVM) are very important for the efficiency and accuracyof the voltage source inverter (VSI). Therefore, this paper presents a performance evaluation of a two-level VSI for the photovoltaic (PV) system based on adopted switching controllers namely, SPWM and SVM switching methods. The evaluation procedure and accuracy are demonstrated and investigated using simulations conducted for a 1.5 kW inverter in a MATLAB/Simulink environment. Two types of loads are utilized to assess the performance of the VSI which are resistive (R) load and resistive and inductive (RL) load. Total harmonic distortion (THD) is used for the comparison of the SPWM and the SVM. Results show that the SVM performs better compared with the SPWM in terms of THD rate. The THDs for SVM based system are found to be 0.02% and 0.08% for the R and RL, respectively; whereas the THDsfor SPWM controller are found to be 0.43% and 0.51% for the R and RL, respectively. Furthermore, mean square error (MSE) is also consideredas a statistical indicator. The MSE indicates that the SVM switching controller technique have superior outcomes compared with the SPWM switching controller technique and thus increases the efficiency of the whole system
Analysis of Emission from Petrol Vehicles in the Koforidua Municipality, GhanaIJERA Editor
Koforidua has seen its fair share in the increase in the number of cars on its roads over the past decade. This has resulted in progressive increase in traffic congestion on the roads and could lead to deterioration in the air quality. Exhaust gas emissions from a total of 104 vehicles were tested with an exhaust gas analyzer. Hydrocarbons (HC), Carbon dioxide (CO2) and Carbon monoxide (CO) were measured and compared with EU standards for gasoline vehicles and Auto Data Technical information. A series of algorithms developed using Microsoft Excel Spread Sheet were used to analyze the data collected. Out of the total number of cars tested, 74 and 80 cars passed the HC and CO tests respectively. 10 cars out of the total were rated as good under CO2 test. In total, 69.5% of the cars tested passed the various tests conducted and about 73 cars representing 70.2% of the cars tested were over 10 years and the emission standards for those years were flexible.
The Equation Based on the Rotational and Orbital Motion of the PlanetsIJERA Editor
Equations of dependence of rotational and orbital motions of planets are given, their rotation angles are calculated. Wave principles of direct and reverse rotation of planets are established. The established dependencies are demonstrated at different scale levels of structural interactions, in biosystems as well. The accuracy of calculations corresponds to the accuracy of experimental data
In this paper, we introduce intense subgraphs and feeble subgraphs based on their densities and discuss mild balanced IFG and equally balanced intuitionistic fuzzy subgraphs and their properties. The operations “sum” and “union” of subgraphs of Intuitionistic Fuzzy Graphs (IFG) are analyzed. As an application of equally balanced IF subgraphs, curriculum and syllabus formation in higher educational system is discussed. Mathematics Subject Classification: 05C72, 03E72, 03F55.
Evaluation of Anti-oxidant Activity of Elytraria acaulis Aerial ExtractsIJERA Editor
Elytraria acaulis, a stem less perennial herb of Acantheceae family has many medicinal and therapeutic properties. Anti oxidative activity of the aerial parts of this Elytraria acaulis were assessed in the present study. The aerial parts of the plant (Stem & Leaves) were extracted in different organic solvents such as n-Hexane, Ethanol, Methanol, Ethyl Acetate and Chloroform. Initially, Total Phenolic & Total Flavonoids content in different solvent plant extracts were estimated. The free radical scavenging and antioxidant activity of the Elytraria acaulis aerial extracts in different organic solvents were also assayed by DPPH assay, FRAP assay. The aerial extracts of Elytraria acaulis have shown significant anti oxidant activity. Hence, further studies on this plant will enable elucidation of its therapeutic properties and medicinal applications
Brainstorming: Thinking - Problem Solving StrategyIJERA Editor
Brainstorming is a popular tool that helps you generate creative answers to a problem. It is mainly useful when you want to break out of stale, established patterns of thinking, so that you can develop new ways of looking at things. The aforementioned also helps you overcome many of the concerns that can make collection problemsolving a sterile and substandard process. Though group brainstorming is often more effective at generating ideas than normal group problem-solving, study after study has revealed that when individuals brainstorm on their own, they come up with more ideas and often better quality ideas than groups of people who brainstorm together.
Moringa Seed, Residual Coffee Powder, and Banana Peel as Biosorbents for Uran...IJERA Editor
The uranium mining deserves attention with regard to environmental impacts and water pollution in Brazil. The research objective was to enable the use of biomass as cheap and available adsorbents for uranium removal from acid mine drainage. Three types of biomass were tested: banana peel, residual coffee powder, and moringa seed. Synthetic uranium solution (SS) and acid mine drainage (AMD) were used in the equilibrium adsorption experiments. Remarkable total uranium removal efficiencies were observed for moringa (96.8 ± 2.2 [SS] and 86.5 ± 0.8% [AMD]), coffee (89.4 ± 11.2 [SS] and 73.7 ± 2.2% [AMD]), and banana (48.2 ± 14.0 [SS] and 55.9 ± 4.8% [AMD]). The highest experimental adsorption densities were 18.7, 19.1, and 6.3 mg∙g-1 , respectively. Quantitative curves were described for each adsorbent and can be used for practical applications. Design and operating parameters for uranium removal from AMD as a post-treatment, polishing method can be determined beforehand.
FE Simulation Modelling and Exergy Analysis of Conventional Forging Deformati...IJERA Editor
The present paper examines the deformation behaviour of geometrical specimens of an aluminium alloy undergoing axial compression in a Universal Testing Machine under dry condition. It is observed that researchers have made attempts to investigate alternate specimens for friction calibration. It is found that ring compression test is recommended as the standard test for determination of coefficient of friction, because it gives reliable results. The effect of weight percentage of silicon carbide on microstructure, hardness and upsetting load is studied. The friction factor at die metal interface is evaluated by ring compression tests and its effect on non-uniform deformation is investigated. The experimental results are finally compared with those obtained by FEA simulation and modelling. In order to validate the predictability of these specimens, real experiments on them are carried out. Rings of standard dimensional ratio 6:3:1 in the same machine. Friction predictions from both specimen are found to be in close match, proposed alternate specimen offers a powerful tool for friction prediction in the absence of ring specimen. Some aspects of Exergy calculations have been in the past repeatedly used to quantify the quality and quantity of energy used in thermal energy processes. This attempt to drive a exergy utilization and compare for the first time two entirely different manufacturing processes, material processing by a mechanical method of straining of the material and thermal processing during cold forging of the same mass of the material using exergy formulation as metric. The exergy analysis of material processing is determined by performed work and utilized heat transfer using mechanical and thermal processes
A study of Heavy Metal Pollution in Groundwater of Malwa Region of Punjab, In...IJERA Editor
Among the different types of pollution, heavy metal pollution has become one of the major environmental issues in India. A number of studies show that high level of heavy metal exposure is a frequent cause of permanent intellectual and developmental disabilities. In this present study, the AAS method is used to determine the various heavy metal concentrations for 240 samples of Groundwater distributed in eight districts in Malwa Region of Punjab. The concentration values were compared with Standard Values given by BIS. The results showed that the maximum percentage of groundwater samples of Malwa region is beyond the permissible limits and that’s why not fit for drinking purposes and other domestic activities due to the presence of various heavy metals . The overall groundwater quality of Punjab for Arsenic, lead, Iron, Cobalt, Chromium, zinc and Mercury can also be detected and compared with BIS standards. The aim of this particular study was to investigate the distribution of Heavy metals in groundwater of Malwa Region of Punjab and its greater risks to public health. The results were compared with the recommended standards for drinking water of BIS to know the existing status and trend. Overall, water quality was found as unsatisfactory for drinking purposes in all the samples
“Electricity Generation by Universal Neodymium Permanent Magnetic Rotor by Re...IJERA Editor
In this paper construction of universal neodymium permanent magnetic rotor without any electromagnetic core, due to this we will reduce 38% of core losses and increase the stability of the system efficiency. Now a day’s electricity generation from various sources like hydro, steam, solar, nuclear etc. but these sources have some merits & demerits. By these sources have more demerits as well as its have more losses, so we not fulfill the costumer/industrial requirements. For alternate arrangement we have been innovated this system
An Intelligent Healthcare Serviceto Monitor Vital Signs in Daily Life – A Cas...IJERA Editor
Vital signs monitoring for elderly in daily life environment is a promising concept that efficiently can provide medical services to people at home. However, make the system self-served and functioning as personalized provision makes the challenge even larger. This paper presents a case study on a Health-IoT system where an intelligent healthcare service is developed to monitor vital signs in daily life. Here, a generic Health-IoT framework with a Clinical Decision Support System (CDSS) is presented. The generic framework is mainly focused on the supporting sensors, communication media, secure and safe data communication, cloud-based storage, and remote accesses of the data. The CDSS is used to provide a personalized report on persons‟ health condition based on daily basis observation on vital signs. Six participants, from Spain (n=3) and Slovenia (n=3) have been using the proposed healthcare system for eight weeks (e.g. 300+ health measurements) in their home environments to monitor their health. The sensitivity, specificity and overall accuracy of the DSS‟s classification are achieved as 90%, 97% and 96% respectively while k=2 i.e., top 2 most similar retrieved cases are considered. The initial user evaluation resultdemonstrates the feasibility and performance of the implemented system through the proposed framework.
Design of Low Power Vedic Multiplier Based on Reversible LogicIJERA Editor
Reversible logic is a new technique to reduce the power dissipation. There is no loss of information in reversible logic and produces unique output for specified inputs and vice-versa. There is no loss of bits so the power dissipation is reduced. In this paper new design for high speed, low power and area efficient 8-bit Vedic multiplier using Urdhva Tiryakbhyam Sutra (ancient methodology of Indian mathematics) is introduced and implemented using Reversible logic to generate products with low power dissipation. UT Sutra generates partial product and sum in single step with less number of adders unit when compare to conventional booth and array multipliers which will reduce the delay and area utilized, Reversible logic will reduce the power dissipation. An 8-bit Vedic multiplier is realized using a 4-bit Vedic multiplier and modified ripple carry adders. The proposed logic blocks are implemented using Verilog HDL programming language, simulation using Xilinx ISE software
Maraging Steels (Properties, Microstructure & Applications)MANICKAVASAHAM G
Maraging steel is used in aircraft, with applications including landing gear, helicopter undercarriages, slat tracks and rocket motor cases – applications which require high strength-to-weight material.
Maraging steel offers an unusual combination of high tensile strength and high fracture toughness.
Most high-strength steels have low toughness, and the higher their strength the lower their toughness.
The rare combination of high strength and toughness found with maraging steel makes it well suited for safety-critical aircraft structures that require high strength and damage tolerance.
EVALUATION OF PROCESSES PARAMETER AND MECHANICAL PROPERTIES IN FRICTION STIR ...IAEME Publication
The present study focuses on Friction Stir Welding of steel being very popular due to the vast application in the fields of automotive and ship building industries. The main constrained of welding steel has considered due to severe loads and temperatures at the interface of FSW tool and parent materials. Ti and pcBN based alloys are suitable for joining steel alloys up to 15 mm thick was found during study. Many researchers carried out study on FSW of steel and found on weld process parameters, mechanical properties, microstructure and the tool employed to produce the weld. It was found that carbon content, welding speed as well as the rotational speed affects between the mechanical properties and the microstructure of the weld.
Stainless steel is one of the most important materials in the engineering world. The material‟s wide applications in chemical, petrochemical, off-shore, and power generation plants prove that it is one of the most reliable materials. The Newest fast growing family of stainless steels is duplex alloys. The ferritic-austenitic grades have a ferrite matrix intermix with austenite and in other words island of austenite in a continuous matrix of highly alloyed ferrite commonly called „Duplex‟ stainless steel. Duplex stainless steel covers ferritic/austenitic Fe-Cr-Ni alloy with between 30% to 70 % Ferrite .Due to high level of Cr, Mo, and N steels shows high pitting & stress corrosion cracking resistance in chloride-containing environments. Hence it is frequently used in oilrefinery heat exchangers & typical applications where there is a risk for SCC and localized corrosion as a result of chloride-containing process streams, cooling waters or deposits. Modern duplex stainless steels have generally good Weldability. Due to a balanced composition, where nitrogen plays an important role, austenite formation in the heat affected zone (HAZ) and weld metal is rapid. Under normal welding conditions a sufficient amount of austenite is formed to maintain good resistance to localized corrosion where as too rapid cooling may result in excessive amounts of ferrite, reducing the toughness. Therefore, welding with low heat input in thick walled materials should be avoided. Welding methods, such as resistance welding, laser welding and electron beam welding, which cause extremely rapid cooling should also be avoided or used with extreme caution. Too slow cooling can in the higher alloyed duplex grades cause formation of inter-metallic phases detrimental to corrosion resistance and toughness.
Studying the Fatigue Properties Of Hardened For Carbon Steelijceronline
In this study, Medium carbon steel is one of the most important materials used in industrial applications especially it is used in applications exposed to fatigue stresses such as airplanes, automotive components and electrical engines industries. Medium carbon steels were prepared and the effect of hardening on hardening strength of medium carbon steel was studied, the flame hardening method was used at different speeds then fatigue test was done. The following results were obtained, first sample (none), second sample (3.5 mm/s), and third sample (1.75 mm /s) and forth sample (1.165 mm/s). It has been found that as the flaming speed increases, the fatigue strength of the material decreases. The fatigue test result at stress (407.44 N/mm2 ) was as follow: for the first sample the no. of cycles to failure was at (67511 rpm), for the second sample (95832 rpm), for the third sample (122565rpm) and for the fourth sample it was (134585 rpm).
Sensitization of Gold Dust in 430 Grade Stainless SteelIJAEMSJORNAL
'Gold dusting' is a surface defect that is sometimes observed on cold-rolled AISI type 430 stainless steel. Gold dusting is characterized by a sparkling appearance, which results from small flakes of metal on the cold rolled surface, the flakes are mostly elongated in the rolling direction. The processing steps include continuous casting, hot rolling, continuous annealing, and pickling. One possibility is that the flakes of metal are grains that had been undercut by intergranular corrosion such intergranular corrosion may occur during pickling after the annealing step (which itself follows hot rolling). If intergranular corrosion does occur during this pickling step, the intergranular cavities would be elongated by subsequent cold rolling; this can account for the observed morphology of gold dusting. If the steel has been sensitized, intergranular corrosion may occur during pickling. Pickling is commonly carried out by electrolytic descaling in a neutral sodium sulphate solution followed by immersion in a nitric acid/hydrofluoric acid bath. The sensitized type 430 stainless steel does, indeed, suffer intergranular corrosion in a nitric acid/hydrofluoric acid bath, while it is largely unaffected during electrolytic pickling. Hence, sensitization is a possible cause of gold dusting.
Mechanism of Fracture in Friction Stir Processed Aluminium AlloyDr. Amarjeet Singh
Aluminium alloys are used for important
applications in reducing the weight of the component and
structure particularly associated with transport, marine,
and aerospace fields. Grain refinement by scandium (Sc)
addition can eliminate the casting defects and increase the
resistance to hot tearing for high strength aluminium alloys.
FSP for cast aluminium alloys have been focused and it has
great advantages including solid state microstructural
evolution, altering mechanical properties by optimizing
process parameters. These parameters are tool rotational
speeds (720, and 1000 rpm), traverse speeds (80, and 70
mm/min), and axial compressive force at 15 kN, etc. The
mechanical properties had been evaluated on FSPed
aluminium alloy with different microstructural conditions.
Fracture properties of aluminium alloys are very important
for industrial applications. Tensile and fracture toughness
properties were correlated to microstructural and
fractographic features of the aluminium alloys need to
explore their essential failure mechanisms.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Baja terdiri dari unsur-unsur paduan yang memerikan sifat-sifat yang berbeda dari setiap unsurnya. Berikut daftar dari unsur-unsur pembentuk baja beserta fungsi-fungsinya.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
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Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
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Design and Analysis of Algorithms-DP,Backtracking,Graphs,B&B
Duplex 2209 Weld Overlay by ESSC Process
1. Er. Manoj Kumar. Int. Journal of Engineering Research and Application www.ijera.com
ISSN : 2248-9622, Vol. 7, Issue 3, ( Part -2) March 2017, pp.92-98
www.ijera.com DOI: 10.9790/9622- 0703029298 92 | P a g e
Duplex 2209 Weld Overlay by ESSC Process
Er. Manoj Kumar1
, Dr. Abhishek Kamboj2
1
M.tech research Scholar,Haryana Engineering College
2
Associate Professor, Haryana Engineering College
ABSTRACT
In the modern world of industrialization the wear is eating metal assets worth millions of dollars per year. The
wear is in the form of corrosion, erosion, abrasion etc. which occur in the process industries like oil & gas,
refineries, cement plants, steel plants, shipping and offshore working structures. The equipments like pressure
vessels, heat exchangers, hydro processing reactors which very often work at elevated temperatures face
corrosion in the internal diameter. Duplex 2209 weld overlay on ferrous material is developed for high corrosion
resistance properties and having high productivity by Electroslag strip cladding process due to its less dilution
~10% as compared to SMAW , GTAW or FCAW process. Because of Low Dilution ~10% undiluted chemistry
can be achieved with single layer as compared to other weld overlay processes. The facility was developed in-
house to carry out weld overlay by ESSC and Testing.
I. INTRODUCTION
Duplex stainless steel are called “Duplex”
because they have a two-phase microstructure
consisting of grains of ferritic and austenitic
stainless steel. When duplex stainless steel is
melted it solidifies from the liquid phase to
completely ferritic structure. As the material cools
through temp above about 1040 deg C to room
temperature, about half of the ferritic grains
transfer to austenitic grains. The result is a
microstructure of roughly 50% austenite and 50%
ferrite. This is accomplished by increasing
Chromium and decreasing Ni as compared to ASS
grades & by adding Nitrogen (a strong austenite
promoter) to speed the rate up of austenite
formation during cooling[1].
A minimum 10.5% Chromium is
necessary to form a stable Chromium passive film
that is sufficient to protect steel against
atmospheric corrosion. The corrosion resistance of
SS increases with increasing Chromium content.
Chromium is a ferrite former, meaning that the
addition of Chromium promotes the BCC structure
of iron. At higher Chromium contents, more nickel
is necessary to form an austenite or duplex
structure. Higher Chromium also promotes the
formation of intermetallic phases. Chromium also
increases the oxidation resistance at elevated
temperatures.
Molybdenum acts to support Chromium in
providing pitting corrosion resistance to stainless
steels. When the Chromium content of a SS is at
least 18%,addition of Mo become about three times
as effective as Chromium addition against pitting
and crevice corrosion in Chloride-containing
environment.Molybdenum is a ferrite former and
also increases the tendency of a SS to form
detrimental intermetallic phases.Therefore,it is
restricted to less than about 7.5% in ASS and 4% in
Duplex SS[1,2].
Nitrogen increases the pitting and crevice
corrosion resistance of austenite and Duplex SS. It
also increases strength and is most effective solid
solution strengthening element and low cost
element. The improved toughness of nitrogen
bearing duplex SS is due to their greater austenite
content and reduced intermetallic content. Nitrogen
does not prevent the precipitation of intermetallic
phases but delays the formation of inter- metallics
enough to permit processing and fabrication of
duplex stainless steel. Nitrogen is added to highly
corrosion resistant austenite and duplex stainless
steels that contain high chromium and
molybdenum contents to offset their tendency to
form sigma phase. Nitrogen is the key element,
apart from aiding austenite formation, it plays a
role in partitioning of alloying element Cr,Mo
between ferrite and austenite.
During welding, there is a danger that the
austenite formed from ferrite from heating, will
contain only the low amount of N that was in the
ferrite from which it was formed. if heating time is
sufficient ,Nitrogen can diffuse from the original
austenite to restore equilibrium.But, if the heating
time is too short, the so called secondary austenite
will have low N & therefore lower pitting corrosion
resistance.
Nitrogen helps to alter phase stability ,
making austenite stable to higher temperature,&
this prevents welds from becoming excessively
ferritic and disturbing the desirable 50 to 50
ratio[1,6].
1.1 Characteristics of Duplex stainless steels
Excellent resistance to stress corrosion
cracking
RESEARCH ARTICLE OPEN ACCESS
2. Er. Manoj Kumar. Int. Journal of Engineering Research and Application www.ijera.com
ISSN : 2248-9622, Vol. 7, Issue 3, ( Part -2) March 2017, pp.92-98
www.ijera.com DOI: 10.9790/9622- 0703029298 93 | P a g e
Very high mechanical strength
Excellent resistance to pitting and crevice
corrosion
High resistance to general corrosion in a
variety of environments
Low thermal expansion
High resistance to erosion corrosion and
corrosion fatigue
Good weldability
Lower life cycle cost[1]
Duplex stainless steel is having higher
critical crevice corrosion temperature as well as
critical pitting corrosion temperature as compared
to austenitic stainless steel material as shown in
below Fig.1 and Duplex stainless steel is having
lower corrosion rate than austenitic stainless steel
in formic acid Concentration as shown in Fig.2[2,5]
Fig. 1
Fig. 2
1.2 Chemical Composition of Dupex 2209
Element % Composition
Nickel 8.5-10.5
Chromium 22-24
Molybdenum 2.5-3.5
Carbon 0.04 max
Manganese 0.5-2.0
Sulfur 0.03 max
Silicon 1.0 max
Phosphorous 0.04 max
Table 1
Cladding is a welding process in which a
material with desired properties is deposited on the
surface of a base material. The common C/Mn or
low alloyed inexpensive base metal has mainly a
load carrying function. The deposited sophisticated
material imparts surface properties such as
corrosion resistance; wear resistance, erosion and
pitting etc., to the substrate. To the manufacturer of
pressure vessels, surfacing techniques are getting
more and more important. Components reach sizes
such that their fabrication calls upon the use of clad
materials[3,6].
There are different processes to obtain a clad
material:
Clad plates produced by rolling which are
mostly only available in standardized
dimensions and grades
Explosion clad plates
Clad plates made by welding
Further Clad Plates made by welding can be done
using various techniques:-
Submerged arc welding (Wire electrode)
Submerged arc welding (Twin Wire electrode)
Submerged arc welding (Strip Electrode)
Electro slag strip welding
3. Er. Manoj Kumar. Int. Journal of Engineering Research and Application www.ijera.com
ISSN : 2248-9622, Vol. 7, Issue 3, ( Part -2) March 2017, pp.92-98
www.ijera.com DOI: 10.9790/9622- 0703029298 94 | P a g e
Shielded metal arc welding
Flux cored arc welding
Among all the welding processes
submerged arc and electro slag strip cladding offer
maximum deposition rate, better bead
characteristics and trouble free operation using
unsophisticated welding equipments[6,7].
In selecting a particular weld overlay and
cladding system, the following criteria may need to
be considered: Deposit rate (kg/hr), productivity
hardness, corrosion resistance, availability of
consumables with the required metallurgical and
mechanical properties, welding techniques, Quality
of weld & automation technologies.
II. PROCESS DESCRIPTION
The electro slag strip cladding is a
technique, in which a strip electrode is
continuously fed into a shallow layer of electrically
conductive flux. The heat required to melt the strip,
the slag forming flux and the surface layer of the
base metal is generated by resistance heating due to
the welding current flowing through the molten
conductive slag. In relation to the submerged arc
strip cladding, the penetration and hence the
dilution are reduced in electro slag strip cladding
because the absence of arc, typical dilution levels
lying between ~10% [4].The use of a conductive
slag and resistance heating instead of an electric arc
permits higher current densities to be used in ESSC
without increasing penetration. Thus deposition
rates higher than that possible with SASC can be
achieved in ESSC without increasing the degree of
dilution[2,3,4].
The flux used in ESSC contains, in
addition to oxides like Titanium oxide and iron
oxide. A large quantity fluoride of Calcium and
Sodium in order to achieve the required electrical
conductivity. The high Calcium fluoride content in
the flux has been shown to decrease dilution level
and also reduce the oxygen content in the deposited
cladding to a level which is just one third compared
to submerged arc surfacing. Furthermore the
solidification rate of the electroslag weld metal is
lower, facilitating the escape of gases and the rise
of slag particles to the surface. This reduces
porosity and inclusion content[2,3,8].
Fig.3
III. EXPERIMENTATION AND TESTING
Discuss the detail about the experimental data, base metal, filler metal, and welding procedure, welding
parameters of welded specimen and testing.
4. Er. Manoj Kumar. Int. Journal of Engineering Research and Application www.ijera.com
ISSN : 2248-9622, Vol. 7, Issue 3, ( Part -2) March 2017, pp.92-98
www.ijera.com DOI: 10.9790/9622- 0703029298 95 | P a g e
3.1 Experimentation was conducted as per following flow chart
Flow chart shows how experimentation was conducted
3.2 Base Metal and Strip Metal
The base plate of SA 516 Grade 70 low
carbon steel of 60 mm received in normalized heat
treated condition. The strips used were of S.S
309LMo as a buffer lyer and Duplex 2209 as a clad
layer .Table 3.1 shows the chemical composition of
base metal & strips used.
Elements Base Metal SS 309 LMo Duplex 2209
Carbon, C 0.27 0.04 0.04
Silicon, Si 0.15 - 0.40 1.0 1.0
Sulfur, S 0.035 0.03 0.03
Phosphorous, P 0.035 0.04 0.04
Manganese 0.85 - 1.20 0.5-2.5 0.5-2.0
Chromium - 22-25 22-24
Nickel - 12-14 8.5-10.5
Molybdenum - 2-3 2.5-3.5
Table 2
3.3 Welding Parameters
Material thickness : 60 mm
Plate size : 500 X 300 X 60 mm thick
Joint design : weld overlay on CS base plate
Strip for barrier : Sandvik 21.13.3L (~ EQ
309LMo)
Strip for Clad : Sandvik 22.8.3L (~ EQ 2209)
Flux : Sandvik 37S
Weld Bead Height : 9-10 mm- Double Layer
5. Er. Manoj Kumar. Int. Journal of Engineering Research and Application www.ijera.com
ISSN : 2248-9622, Vol. 7, Issue 3, ( Part -2) March 2017, pp.92-98
www.ijera.com DOI: 10.9790/9622- 0703029298 96 | P a g e
Fig.3 Barrier Layer
Fig.4 Clad Layer
Fig.5 Specimen Marking & Prepartion
Parameters Range
Welding current (I) 1150-1300 A
Voltage (V) 24-26V
Travel Speed 170-180 mm/min
Pre heat 100 degree Celsius
Interpass Max 175
Electrode extension (Stick Out) 25-30 mm
Height of Flux 30-35mm
Polarity DCEP
Table 3
3.4 Post Weld Heat Treatment (PWHT)
PWHT was performed at 610 -620⁰ C for
135 minutes after completion of testing with
heating rate 50⁰ C/ hr and cooling rate 40⁰ C /hr.
IV. RESULTS
Visual Examination : Bead Finish- Good
Non Destructive Testing
Dye Penetrant Testing : Acceptable as per
ASME Sec IX .
Ultrasonic Examination : Satisfactory
6. Er. Manoj Kumar. Int. Journal of Engineering Research and Application www.ijera.com
ISSN : 2248-9622, Vol. 7, Issue 3, ( Part -2) March 2017, pp.92-98
www.ijera.com DOI: 10.9790/9622- 0703029298 97 | P a g e
Fig.6
Macro Examination : No porosity, No Lack of Fusion & complete fusion of weld metal & base metal
Fig.7
Bend Test : satisfactory
Fig.8
Fig.9
Test
Performed
Number of
Sample Tested
Degree of
Bend
Acceptance
Standard
Results
Side Bend Test 4 180⁰ ASME Sec IX Satisfactory
Chemical Composition was found satisfactory from 4mm fusion line
Height
(mm)
% Element
C Ni Cr Mo Mn N
Reqd
value
0.04 Max 8.5-10.5 22-24 2.5-3.5 0.5-2.0 0.08-0.20
Top 0.016 8.70 22.57 3.05 1.16 0.16
8.0 0.019 9.02 22.32 3.06 1.19 0.16
7.0 0.018 9.34 22.08 3.04 1.18 0.15
6.0 0.020 9.31 21.83 3.03 1.23 0.14
5.0 0.018 9.30 21.75 3.07 1.18 0.14
4.0 0.019 9.39 21.70 3.03 1.22 0.14
3.0 0.040 *12.17 *16.55 *2.41 1.32 0.011
CORROSION TESTING AS PER ASTM 923 METHOD C
7. Er. Manoj Kumar. Int. Journal of Engineering Research and Application www.ijera.com
ISSN : 2248-9622, Vol. 7, Issue 3, ( Part -2) March 2017, pp.92-98
www.ijera.com DOI: 10.9790/9622- 0703029298 98 | P a g e
Result observed: satisfactory
Acceptance criteria
The corrosion rate is calculated in
accordance with the weight loss & it should be less
than 10 mdd( milligrams per square decimeter per
day)
Initial weight of specimen : 43.161g
Weight after 24 hours : 43.1603 g
Weight loss : 0.0007 g (0.70 mg)
Corrosion rate : 2.2150 mdd (acceptable)
Fig.10 Corrosion Specimen (ASTM 923 METHOD
C)
V. CONCLUSION
Typical to weld Duplex 2209 welded
successfully meeting the requirement of ASME Sec
IX & Sec IIC.
VI. SCOPE OF FUTURE WORK
As a future work, we will establish
corrosion test as per customer requirement such as
ASTM G-48 method A-pitting corrosion & method
B –Crevice Corrosion, ASTM G-36 etc.
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