1) The document discusses aluminum matrix composites (AMCs), which have promising properties for industrial applications but are challenging to machine.
2) Electrochemical micromachining (EMM) is presented as a potential machining method for AMCs as it provides good surface finish, avoids tool wear and thermal damage, and can machine complex shapes in hard materials.
3) The document reviews literature on AMCs fabricated through stir casting, as well as experimental studies on EMM processes for micro-machining composites.
Aluminium Based Metal Matrix Composites for Aerospace Application: A Literatu...iosrjce
IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of mechanical and civil engineering and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications in mechanical and civil engineering. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Design and Fabrication of a Stir Casting Furnace Set-UpIJERA Editor
Now-a-days a large variety of heating techniques/furnaces are available. There may be many method for supplying heat to the work but heat is produced either by combustion of fuel or electric resistance heating. Taking into consideration the effect of cost, safety, simplicity and ease of construction we are going for an electrical resistance heating furnace with indirect heating provisions. The stir casting furnace has two main parts that enable to perform all its operations, they are: Furnace Elements and Control Panel. This paper shows the design and fabrication of stir-casting furnace and aluminium melted and casted to form.
Effect of Nano-Magnesium Oxide and Graphite Particles on Mechanical Propertie...Premier Publishers
The main objective of this present work is to determine the densification, hardness and impact strength behavior on LM09 alloy reinforced with graphite and magnesium oxide nano-particles. LM09 is lighter metal as compared to other engineering metals/alloys except magnesium and beryllium. In this research stir casting process was used to fabricate hybrid LM09 nano-composite. The composites were prepared by varying the proportion of reinforcements such as 1.2 wt.% graphite (constant) and 1.5-3.5 wt. % magnesium oxide. Densities of alloy and nano-composites were determined by using the rule of mixture and Archimedes principles. Composite with 1.2 wt. % graphite and 2.5 wt. % magnesium oxide have 95.75% of relative density. Theoretical and actual densities are closer so that the cast composites were produced with less porosity. The mechanical properties of nano-composite such as hardness and impact strength was measured and clearly show that the LM09 alloy is enhanced through the reinforcement of nano-particles. Hybrid nano-composite reinforced with 2.5 wt. % magnesium oxide dominates the hardness as compared to other composites (1.5 and 3.5 wt. % magnesium oxide) The increase in reinforcement particles enhances the impact strength proportionally. The present finding concludes that LM09 hybrid composite having 1.2 wt. % graphite and 2.5 wt. % magnesium oxide can be used for engineering applications.
Aluminium Based Metal Matrix Composites for Aerospace Application: A Literatu...iosrjce
IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of mechanical and civil engineering and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications in mechanical and civil engineering. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Design and Fabrication of a Stir Casting Furnace Set-UpIJERA Editor
Now-a-days a large variety of heating techniques/furnaces are available. There may be many method for supplying heat to the work but heat is produced either by combustion of fuel or electric resistance heating. Taking into consideration the effect of cost, safety, simplicity and ease of construction we are going for an electrical resistance heating furnace with indirect heating provisions. The stir casting furnace has two main parts that enable to perform all its operations, they are: Furnace Elements and Control Panel. This paper shows the design and fabrication of stir-casting furnace and aluminium melted and casted to form.
Effect of Nano-Magnesium Oxide and Graphite Particles on Mechanical Propertie...Premier Publishers
The main objective of this present work is to determine the densification, hardness and impact strength behavior on LM09 alloy reinforced with graphite and magnesium oxide nano-particles. LM09 is lighter metal as compared to other engineering metals/alloys except magnesium and beryllium. In this research stir casting process was used to fabricate hybrid LM09 nano-composite. The composites were prepared by varying the proportion of reinforcements such as 1.2 wt.% graphite (constant) and 1.5-3.5 wt. % magnesium oxide. Densities of alloy and nano-composites were determined by using the rule of mixture and Archimedes principles. Composite with 1.2 wt. % graphite and 2.5 wt. % magnesium oxide have 95.75% of relative density. Theoretical and actual densities are closer so that the cast composites were produced with less porosity. The mechanical properties of nano-composite such as hardness and impact strength was measured and clearly show that the LM09 alloy is enhanced through the reinforcement of nano-particles. Hybrid nano-composite reinforced with 2.5 wt. % magnesium oxide dominates the hardness as compared to other composites (1.5 and 3.5 wt. % magnesium oxide) The increase in reinforcement particles enhances the impact strength proportionally. The present finding concludes that LM09 hybrid composite having 1.2 wt. % graphite and 2.5 wt. % magnesium oxide can be used for engineering applications.
MANUFACTURING AND FORCE DETERMINATION OF COMPOSITE DISC BRAKEIAEME Publication
This paper deals with design and analysis of disc brake rotor using composite material. Thecomposite material used is Aluminum Metallic Medium Composite it is a the combination of
aluminum and silicon carbide length ways With a small percentage of other materials likemagnesium, aluminum oxide, graphite .These additional materials are added in accurate quantity
to increase the chemical, mechanical and thermal properties ofmaterial. The manufacturing
process is carried ready in organized location. Magnitude die casting process is used tomanufacture the disc brake using the composite material. In this paper the composite disc brakeismodeled in CATIA .The forces acting on the disc brake model are calculated using ADAMSsoftware.
Fabrication and Electrical Discharge Machining of Al-SiC-Mg Composite with Me...Dr. Amarjeet Singh
Composites are the materials obtained by
combinations of different materials, with greater and better
properties that are not present in the individual parent
material. Due to its outstanding properties like light weight,
corrosion resistance, higher strength and better thermal and
electrical properties it is widely used. More than 40000
products of composite materials are used across the Globe. In
this work Aluminium Metal Matrix Composite is formed with
varying percentage of SiC and Mg. The electrical discharge
machining (EDM) of the fabricated composite material has
done to observe the material removal rate (MRR) and surface
roughness along with different tests such as XRF, hardness
test, tensile test and compression test. This paper represents
the information that are observed after conducting various
tests on composites casted by varying the percentage of Sic
and Mg.From Various tests it is observed that with increase
in percentage of SiC and Mg hardness, Young’s modulus and
MRR increases
Optimization of Process Parameters in Wire Electrical Discharge Machining of ...IJERA Editor
Wire electrical discharge machining (WEDM) is a specialized thermal machining process capable of accurately machining parts with varying hardness or complex shapes, which have sharp edges that are very difficult to be machined by the main stream machining processes. This practical technology of the WEDM process is based on the conventional EDM sparking phenomenon utilizing the widely accepted non-contact technique of material removal. Since the introduction of the process, WEDM has evolved from a simple means of making tools and dies to the best alternative of producing micro-scale parts with the highest degree of dimensional accuracy and surface finish quality. Metal matrix composites are advanced materials having high specific strength, good wear resistance, and high thermal expansion coefficient. To achieve this task, machining parameters such as pulse on time, pulse off time, peak current, servo voltage, wire feed, wire tension etc. of this process should be selected such that optimal value of their performance measures like Material Removal Rate (MRR), Surface Roughness (SR), Gap current, Dimensional deviation, etc. can be obtained or improved. In past decades, intensive research work had been carried out by different researchers for improvement and optimization of WEDM performance measures using various optimization techniques like Taguchi, Response Surface Methodology (RSM), Artificial Neural Network (ANN), Genetic Algorithm (GA), etc. This paper also highlights the feasibility of the different control strategies of obtaining the optimal machining conditions. This literature review helps to identify the suitable process parameters and their ranges in machining of metal matrix composites.
STUDIES OF MICROSTRUCTURE, MECHANICAL AND TRIBOLOGICAL PROPERTIES OF AL-2Cu-2...dbpublications
The aim is to study the mechanical, tribological property and wear behavior of Al7068 alloy/alumina composite with various weight fractions (3%, 5%, 7%) were prepared by stir casting method. In addition, Al7068 were cast for comparison purposes. Microstructure, hardness and tensile properties of these composites were evaluated and compared with as-cast alloy and the composites. In addition, tribological properties of these composites were also evaluated. The wear and mechanical properties of composites improve with increasing the weight fraction of Alumina and then decreases gradually. This study provides an alternative way to enhance the tribological behavior of Al7068 alloy/Alumina composite. The study also highlights the different contribution of different input process parameters (like: composition of Al7068 alloy/Alumina and particle size of reinforcement material) on wear properties of Al7068 alloy/Alumina MMCs.
IMPACT OF AL-COMPOSITES IN THE MANUFACTURING INDUSTRY: A NECCESSITYIAEME Publication
In the engineering sector today, the need to substitute for orthodox materials like wood, aluminium, steel and concrete, has led to the invention of raw materials that meet specific needs like hardiness-to-mass ratio, i.e. increased strength and light weight, increased strength of impact, dimensional constancy and resistance to corrosion. These materials are called composites. In this paper, we have assessed several articles by a number of researchers on the impact of composites in the manufacturing industry, making aluminium composites our focus. This review studied the properties, behaviours, applications, advantages and setbacks, of aluminium composites. From this study, it was observed that the automotive industry makes the most use of aluminium composites, for the manufacture of parts like pistons and connecting rods. However, processing of Al-dependent MMC’s is costlier than other raw materials. And this is a major setback in the use of aluminium composites in the manufacturing industry.
We illustrate the application of composite material in aerospace industry. Composites are highly efficient to make the parts and structure of aircrafts. We found the characteristics of the composite material make it very suitable material for aerospace industry. Composites like carbon fiber, carbon epoxy, and glass epoxy are very light and high strength which is mostly used in aircraft industries. In addition, our study takes the first step to highlight the uses of composite material to manufacture the different parts of aircrafts.
A review of Carbon Nanotube Reinforced Aluminium Composite and Functionally ...IJMER
Material selection is a very critical issue when it comes to aerospace engineering. Materials
should have good qualities like light weight, high strength and corrosion resistance with economic
viability. Over the period, Aluminium blends of composite are used for variety of applications. Carbon
Nanotube reinforced Aluminium composites and Functionally graded composites(FGC ) are the new
developments in materials engineering. Gradual but continuous variation in composition and structure
over volume, results in corresponding changes in the properties of material in contrast to homogeneous
mixing of CNT in case of composite. FGM promises to be more suitable in the future. This paper focuses
on brief review of CNT reinforced Aluminium composite and FGM application in aerospace.
MANUFACTURING AND FORCE DETERMINATION OF COMPOSITE DISC BRAKEIAEME Publication
This paper deals with design and analysis of disc brake rotor using composite material. Thecomposite material used is Aluminum Metallic Medium Composite it is a the combination of
aluminum and silicon carbide length ways With a small percentage of other materials likemagnesium, aluminum oxide, graphite .These additional materials are added in accurate quantity
to increase the chemical, mechanical and thermal properties ofmaterial. The manufacturing
process is carried ready in organized location. Magnitude die casting process is used tomanufacture the disc brake using the composite material. In this paper the composite disc brakeismodeled in CATIA .The forces acting on the disc brake model are calculated using ADAMSsoftware.
Fabrication and Electrical Discharge Machining of Al-SiC-Mg Composite with Me...Dr. Amarjeet Singh
Composites are the materials obtained by
combinations of different materials, with greater and better
properties that are not present in the individual parent
material. Due to its outstanding properties like light weight,
corrosion resistance, higher strength and better thermal and
electrical properties it is widely used. More than 40000
products of composite materials are used across the Globe. In
this work Aluminium Metal Matrix Composite is formed with
varying percentage of SiC and Mg. The electrical discharge
machining (EDM) of the fabricated composite material has
done to observe the material removal rate (MRR) and surface
roughness along with different tests such as XRF, hardness
test, tensile test and compression test. This paper represents
the information that are observed after conducting various
tests on composites casted by varying the percentage of Sic
and Mg.From Various tests it is observed that with increase
in percentage of SiC and Mg hardness, Young’s modulus and
MRR increases
Optimization of Process Parameters in Wire Electrical Discharge Machining of ...IJERA Editor
Wire electrical discharge machining (WEDM) is a specialized thermal machining process capable of accurately machining parts with varying hardness or complex shapes, which have sharp edges that are very difficult to be machined by the main stream machining processes. This practical technology of the WEDM process is based on the conventional EDM sparking phenomenon utilizing the widely accepted non-contact technique of material removal. Since the introduction of the process, WEDM has evolved from a simple means of making tools and dies to the best alternative of producing micro-scale parts with the highest degree of dimensional accuracy and surface finish quality. Metal matrix composites are advanced materials having high specific strength, good wear resistance, and high thermal expansion coefficient. To achieve this task, machining parameters such as pulse on time, pulse off time, peak current, servo voltage, wire feed, wire tension etc. of this process should be selected such that optimal value of their performance measures like Material Removal Rate (MRR), Surface Roughness (SR), Gap current, Dimensional deviation, etc. can be obtained or improved. In past decades, intensive research work had been carried out by different researchers for improvement and optimization of WEDM performance measures using various optimization techniques like Taguchi, Response Surface Methodology (RSM), Artificial Neural Network (ANN), Genetic Algorithm (GA), etc. This paper also highlights the feasibility of the different control strategies of obtaining the optimal machining conditions. This literature review helps to identify the suitable process parameters and their ranges in machining of metal matrix composites.
STUDIES OF MICROSTRUCTURE, MECHANICAL AND TRIBOLOGICAL PROPERTIES OF AL-2Cu-2...dbpublications
The aim is to study the mechanical, tribological property and wear behavior of Al7068 alloy/alumina composite with various weight fractions (3%, 5%, 7%) were prepared by stir casting method. In addition, Al7068 were cast for comparison purposes. Microstructure, hardness and tensile properties of these composites were evaluated and compared with as-cast alloy and the composites. In addition, tribological properties of these composites were also evaluated. The wear and mechanical properties of composites improve with increasing the weight fraction of Alumina and then decreases gradually. This study provides an alternative way to enhance the tribological behavior of Al7068 alloy/Alumina composite. The study also highlights the different contribution of different input process parameters (like: composition of Al7068 alloy/Alumina and particle size of reinforcement material) on wear properties of Al7068 alloy/Alumina MMCs.
IMPACT OF AL-COMPOSITES IN THE MANUFACTURING INDUSTRY: A NECCESSITYIAEME Publication
In the engineering sector today, the need to substitute for orthodox materials like wood, aluminium, steel and concrete, has led to the invention of raw materials that meet specific needs like hardiness-to-mass ratio, i.e. increased strength and light weight, increased strength of impact, dimensional constancy and resistance to corrosion. These materials are called composites. In this paper, we have assessed several articles by a number of researchers on the impact of composites in the manufacturing industry, making aluminium composites our focus. This review studied the properties, behaviours, applications, advantages and setbacks, of aluminium composites. From this study, it was observed that the automotive industry makes the most use of aluminium composites, for the manufacture of parts like pistons and connecting rods. However, processing of Al-dependent MMC’s is costlier than other raw materials. And this is a major setback in the use of aluminium composites in the manufacturing industry.
We illustrate the application of composite material in aerospace industry. Composites are highly efficient to make the parts and structure of aircrafts. We found the characteristics of the composite material make it very suitable material for aerospace industry. Composites like carbon fiber, carbon epoxy, and glass epoxy are very light and high strength which is mostly used in aircraft industries. In addition, our study takes the first step to highlight the uses of composite material to manufacture the different parts of aircrafts.
A review of Carbon Nanotube Reinforced Aluminium Composite and Functionally ...IJMER
Material selection is a very critical issue when it comes to aerospace engineering. Materials
should have good qualities like light weight, high strength and corrosion resistance with economic
viability. Over the period, Aluminium blends of composite are used for variety of applications. Carbon
Nanotube reinforced Aluminium composites and Functionally graded composites(FGC ) are the new
developments in materials engineering. Gradual but continuous variation in composition and structure
over volume, results in corresponding changes in the properties of material in contrast to homogeneous
mixing of CNT in case of composite. FGM promises to be more suitable in the future. This paper focuses
on brief review of CNT reinforced Aluminium composite and FGM application in aerospace.
APPLICATION OF ALUMINIUM HYBRID COMPOSITES IN AUTOMOTIVE INDUSTRYBlaza Stojanovic
Strict requirements that are put on mechanical constructions from the aspect of increase of exploitation periods and reduction of their weights, therefore of their prices as well, implicate developments and applications of new composite materials with matrices of lightweight metals. Composite materials with metal matrices are used for engine cylinders, pistons, disc and drum brakes, Cardan shafts and for other elements in automotive and aviation industry. The most important type of metallic materials is composite materials with matrices of aluminium alloys due to a set of their beneficial properties. Improvement of mechanical, especially tribological properties of hybrid composites were provided by the use of certain reinforce materials such as SiC, Al2O3 and graphite in defined weight or volumetric share. New developed hybrid composites with aluminium matrices have significantly higher resistance to wear, higher specific stiffness and higher resistance to fatigue. By the increase of quantities of produced elements made of hybrid composites, decrease of their prices is induced that even further enlarge their applications. The applications of aluminium hybrid composites are considered from the aspect and with the focus on automotive industry.
Evaluation Of Factors Affecting Sliding Wear Behaviour Of Al-Flyash Metal Mat...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.
Characterisation of Aluminum based metal matrix composite reinforcement with...jaswanthLN
It is mainly used for upcoming automotive, aerospace parts.
Its mainly focusing on CHARACTERISATION of base material with reinforcement materials.
By increasing strength, less weight low wear rate etc.
Modeling and Characterization of Metal Matrix Composite Aluminum Graphite Com...ijtsrd
The emergence of metal matrix composites is partly a consequence of an improved understanding of their potentials and limitations based on their science of process, principles of physical metallurgy and interfacial chemistry. They can be produced by conventional casting techniques. The reinforcing material such as particulates of graphite can be added into the melt of any metal during its stirring. The resultant mixture is then cast into a permanent mould. This technique was used to produce aluminum graphite composite containing different percentage concentrations of graphite ranging from zero to twenty 0 20 wt . To solve the problem of making the molten aluminum alloy wetting the graphite, a special chemical activation was carried out. The accent is on mechanical performance, describing how the presence of reinforcement in a metallic matrix influences its mechanical and physical properties. This composite shows a decrease in wear rate due to the presence of graphite fiber in the composite. Nwosu Moses C | Ettah B. O | Eze S. K | Okolie G. C "Modeling and Characterization of Metal Matrix Composite: Aluminum-Graphite Composite" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-2 , February 2021, URL: https://www.ijtsrd.com/papers/ijtsrd33412.pdf Paper Url: https://www.ijtsrd.com/engineering/other/33412/modeling-and-characterization-of-metal-matrix-composite-aluminumgraphite-composite/nwosu-moses-c
Experimental evaluations and performance of the aluminum silicon carbide par...IAEME Publication
Stresses induced due to thermal mismatch between the metal matrix and the ceramic reinforcement in metal matrix composite may impart plastic deformation to the matrix there by
resulting in a reduction of the residual stresses. Thermal mismatch strains also may quite often crack
the matrix resulting in a relaxation of the residual stresses. The interface in MMCs is a porous, noncrystalline portion in comparison with the matrix or the reinforcement (metal matrix and ceramic reinforcement in this case).
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/
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.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
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.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
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.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
a review performance study of electrochemical machining on metal
1. Dogo Rangsang Research Journal UGC Care Group I Journal
ISSN : 2347-7180 Vol-10 Issue-09 No. 03 September 2020
Page | 217 Copyright @ 2020 Authors
A Review: Performance Study of Electrochemical Machining on Metal
Matrix Composite
Kayinat Nazir1
, Er. Neeraj Kumar2
1,PG SCHOLAR,DEPARTMENT OF MECHANICAL ENGINEERING, R N
COLLEGE OF ENGINEERING & TECHNOLOGY, MADLAUDA, PANIPAT
2,ASSISTANT PROFESSOR, DEPARTMENT OF MECHANICAL ENGINEERING, R N
COLLEGE OF ENGINEERING & TECHNOLOGY, MADLAUDA, PANIPAT
Email id : kayinat.n.g@gmail.com
Abstract
The review work is carried out as Aluminum matrix composites (AMCs) have become the most
promising materials in many industrial applications, including electronics, bio- medicine, optics,
bio-technolgy, home appliances, fuel injection system components, ordnance components
mechanical machine parts such as turbine blades, engine casings, bearing cages, gears, dies,
molds, all other major parts in automobile and aerospace industries. AMCs are having high
modules, low ductility, high thermal conductivity, low thermal expansion,high strength-to-weight
ratio, high toughness, high-impact strength, high wear resistance, low sensitivity to surface flaws,
and high surface durability. Stir casting method is very popular in AMC’s fabrication due to its
unique advantages. The hard particles present in the matrix, poor machining properties of AMC
and drilling of AMCs are challenging tasks for the manufacturing engineers. Several micro-
manufacturing methods have been developed to solve these problems. Among the various
micromachining, electro chemical micromachining (EMM) seems to be a potential one, because it
gives good surface finish, no-tool wear, no thermal damage to the work-piece, higher machining
rate, better precision, control and capability to machine a wide range of materials and complex
shapes can be machined for extremely hard materials. Micromachining technology plays a
significant role in the miniaturization of parts and components find applications in aerospace,
biomedical and electronic industries. Considering the importance of EMM, an in-depth study is
required for a better understanding of the EMM processes on to its application in micro-
machining domain.
Keywords: - AMCs, Industrial applications, complex shapes, EMM..,
1. INTRODUCTION
In many developed countries and several developing countries there exists continued interest in
MMCs. Researchers tried numerous combinations of matrices and reinforcements since the work
on MMCs began in the 1950s. This led to developments for aerospace, but the resultant
commercial applications were limited. The introduction of ceramic whiskers as reinforcement
and the development of in-situ eutectics in the 1960s aided high temperature applications in
aircraft engines.). The principal matrix materials for MCs are aluminum and its alloys. To a
lesser extent, magnesium and titanium are also used, and for several specialized applications as
copper, zinc or lead matrix may be employed. MMCs with discontinuous reinforcements are
usually less expensive to produce than continuous fiber reinforced MMCs, although this benefit is
normally offset by their inferior mechanical properties. Consequently, continuous fiber reinforced
MMCs are generally accepted as offering the ultimate in terms of mechanical properties and
commercial potential. While a variety of matrix materials has been used for making MMCs, the
major emphasis has been on the development of lighter MMCs using aluminum and titanium
2. Dogo Rangsang Research Journal UGC Care Group I Journal
ISSN : 2347-7180 Vol-10 Issue-09 No. 03 September 2020
Page | 218 Copyright @ 2020 Authors
alloys, due to the significant potential of improvement in the thrust-to-weight ratio for the
aerospace and automotive engines. Automotive engineering is currently a major user, particularly
in hot reciprocating applications such as pistons for both diesel and petrol engines where hot-
strength and resistance-to-thermal fatigue are markedly improved by using Aluminum matrix
composites (AMCs). Other engine applications are anticipated, owing to the intense pressures
upon the motor industry for better fuel economy, lower exhaust emissions and improved engine
performance. These pressures are expected to intensify further as legislative, environmental and
consumer demands increase. AMCs are now being used in the aerospace industry, which
represents a major breakthrough in the growing acceptance of these composite materials in a
market with exceptionally high levels of technical requirements. AMCs are also recognized as
having an important role to play in high speed machinery applications where increased operating
speeds of more than 50 % have been achieved. Furthermore, their combination of lightness,
fatigue resistance, and stiffness make them ideal for many sporting applications, such as road and
mountain bicycles. Applications in the defense sector are also varied and make use of some of the
unique properties offered by AMCs. Other applications for AMCs will utilize their thermal and
electrical properties, especially in dimensionally-stable platforms and electronic packaging. In
general, the major advantages of AMCs compared to unreinforced materials, such as steel and
other common metals, are as follows:
Increased specific strengths
Increased specific stiffness
Increased elevated temperature strength
Improved wear resistance
Lower density;
Improved damping capabilities;
Tailorable thermal expansion coefficients;
Good corrosion resistance.
A. TypesofAMCs
AMCs can be classified into four types depending on the type of reinforcement
Particle-reinforced AMCs (PAMCs)
Whisker-or short fiber-reinforced AMCs (SFAMCs)
Continuous fiber-reinforced AMCs (CFAMCs)
Mono filament-reinforced AMCs (MFAMCs.
B. Electrochemical Micro Machining
Material removal techniques have a pivotal role to play in component fabrications. In recent
years, many high-strength alloys are extremely difficult to machine using traditional processes.
The major difference between conventional and non-conventional machining processes is that
conventional processes use a sharp tool for material removal by physical means whereas non-
conventional techniques remove materials by utilizing chemical, thermal, or electrical energy or a
combination of these energies.. Machining high-strength alloys with conventional tools results in
subsurface damage of the work-piece and in tool damage. The tool size and geometry limit the
final component shape that can be machined. Another problem with these tools is that they tend to
leave burrs on the machined surface.
The machining processes are non-traditional in the sense that they do not employ traditional tools
for metal removal and instead they directly use other forms of energy. The problems of high
complexity in shape, size and higher demand for product accuracy and surface finish can be
solved through non-traditional methods. Currently, non-traditional processes possess virtually
unlimited capabilities except for volumetric Material Removal Rates. As removal rate increases,
3. Dogo Rangsang Research Journal UGC Care Group I Journal
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the cost effectiveness of operations also increase, stimulating ever greater uses of non- traditional
processes.
Electrochemical machining is a material removal process similar to electroplating. In this process,
the work-piece to be machined is made as the anode and the tool is made as the cathode of an
electrolytic cell with a salt solution being used as an electrolyte. On the application of a potential
difference between the two electrodes and when adequate electrical energy is available between
the tool and the work-piece, positive metal ions leave the work-piece. Since electrons are removed
from the work-piece, oxidation reaction occurs at the anode. The electrolyte accepts these
electrons resulting in a reduction reaction.
Figure 1: Electrochemical Machining
2. RELATED WORK
A lot of investigations have been carried out to analyze the efficient way for fabrication and
efficient machining of AMCs using EMM.EMM is one of the emerging technologies for micro-
fabrication. It is a method with an increasing research interest the world over; the scientific
community continues to explore its potentials. After going through all the selected literature, the
survey was broadly classified into four different categories; such as (i) Aluminum matrix
composites; (ii) Stir casting process; (iii) EMM - experimental set-up development
A. Aluminium matrix composite
Surappa (2003) concluded that there was an urgent need to develop simple, economical, portable
and non-destructive kits to quantify undesirable defects in AMCs. Aluminum and its alloys
possess excellent properties such as low density, good plasticity, ductility, and good corrosion
resistance. They find extensive applications in aeronautics, astronautics and automobile and high-
speed train fields. However, low hardness and poor impact resistance results in their limited
application in heavy-duty environments. It has been proved that particle-reinforced aluminum
matrix composites can improve the strength and hardness of aluminum and its alloys
considerably. This will severely affect the safety and reliability of components fabricated from
aluminum matrix composites (AMCs). Rosso (2006) asserted that metal matrix composites have a
number of advantageous properties as compared to monolithic metals, including higher specific
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strength, higher specific modulus and resistance to elevated temperatures, better wear resistance
and lower coefficients of thermal expansion. Also, MMCs have several superior mechanical
properties over polymer matrix composites, which include greater transverse stiffness and
strength, better temperature capabilities, greater compressive and shear strengths. There are also
many beneficiary physical properties of MMCs, like resistance to most radiations, non-
inflammability, no significant moisture absorption properties and high thermal and electrical
conductivities.. During direct metal-to-metal contact, the graphite particles from composites pin
surface forms a thin tribo-film between surfaces. Tearing and formation of oxide layer and
graphite film is a continuous process, which results in decrement of wear rate for composite,
when the operating temperatures are increased. The hard particles present in the matrix, poor
machining properties of AMC and the drilling of AMCs are challenging tasks for manufacturing
engineers. To meet these issues, various micro-manufacturing methods have been developed.
Among the various micro-machining methods, electrochemical micro machining (EMM) appears
to be potential one, because it produces good surface finish, no tool wear, no thermal damage to
the workpiece, higher machining rate, better precision, control and capability to machine a wide
range of materials and complex shapes can be machined for extremely hard materials (Malapati
and Bhattacharyya 2011). Prakash and Pruthviraj (2011) mentioned that the major drawbacks
of these Zn-Al based composites are reduced conductivity and poor machinability. Graphite,
being a solid lubricant can improve the machinability of the composites. Furthermore, graphite
possess excellent thermal and electrical conductivity thereby improving the conducting capability
of Zn-Al composites. Jayashree et al. (2013) stated that the aluminum metal matrix composites
with silicon carbide particle reinforcements are finding increased applications in aerospace,
automobile, space, underwater, and transportation applications. This is mainly due to improved
mechanical and tribological properties like strong, stiff, abrasion and impact resistance, and is not
easily corroded. Senthilkumar et al. (2013) stated that the proper selection of manufacturing
conditions is one of the most important aspects in the electrochemical machining process, as these
conditions determine important characteristics such as Material Removal Rate and surface
roughness. The material used in the study was LM25Al/10%SiCp composite. Experiments have
been carried out to establish an empirical relationship between process parameters and responses
in ECM process using response surface methodology. Analysis of variance (ANOVA) is
employed to indicate the level of significance of the machining parameters. Electrolyte
concentration had most significant influence factor on Ra rather than other parameters.
B. Stir casting process
In recent years many fabrication techniques have been developed for particulate-reinforced metal
matrix composites (Al/SiC MMC). These techniques are stir casting, liquid metal infiltration,
squeeze casting, spray decomposition and powder metallurgy (Nai and Gupta 2002;
Balasivanandha Prabu et al; 2006). Among the varieties of fabrication techniques available for
particulates or discontinuous-reinforced metal matrix composites, stir casting is considered to be
the most potential method for engineering applications in terms of its production capacity and cost
efficiency. It is attractive because of its simplicity, flexibility and is the most economical for
large-sized components to be fabricated (Hashim et al., 1999, Balasivanandha Prabu et al.,
2006 and Shanmughasundaram et al., 2011). Lakhan Rathod and Purohit (2013) concluded
that, stirrer position, stirring speed and time and particle preheating temperature are the important
process parameters of the stir casting process.
C. Electrochemical Machining (ECM)
Gussef in 1929 first patented the process resembling ECM. Significant advances during the 1950s
and 1960s emerged ECM as an efficient technology, in the aerospace and aircraft industries.
Electrochemical machining is also another advanced machining technology which offers a better
alternative or sometimes the only alternative in achieving precise 3-D complex-shaped features
and components of difficult-to-machine materials. The advantages of ECM over other traditional
machining processes include its applicability, disregarding the material hardness, comparable high
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Material Removal Rate, no tool wear, and achievement of fine surface features and the production
of components of complex geometry with crack-free and stress free surfaces. Therefore, ECM has
been utilized in many industrial applications, including engine casings, turbine blades, gears,
bearing cages, molds and dies as well as surgical implants. ECM is often termed as ‘reverse
electroplating’, in which it removes material in place of adding it. This is totally based on
Faraday’s law of electrolysis. Bhattacharyya et al., (2002) presented a computer simulation of
cut-and-try procedure for designing tool shape in the ECM of prescribed work geometry and
showed that an optimum value of the feed-back factor for iterative modification of the tool shape
exists. Rajukaretal. (2007) explained that a D.C. voltage (generally about 10 to 25 volts) was
applied across the inter-electrode gap between an anode work-piece and pre-shaped cathode tool.
The electrolyte (e.g. NaCl, NaNO3 aqueous solution etc.) flows at a high speed through the inter-
electrode gap (about 0.1 to 0.6mm). According to Faraday's law, the anode work-piece is
dissolved with the current density from 20 to 200A/cm2. The electrolyte flow takes away the
dissolved material (generally metal hydroxide) and other by-products generated in the process,
such as cathodic gas from the gap. Jo et al. (2008) employed micro-ECM to fabricate various 3D
micro-structures such as micro-holes and micro-grooves. The final shape of the work-piece is
nearly negative mirror image of the tool electrode. Hocheng et al. (2009) proposed a
computational model to predict the erosion profile in the use of a simple flat-end electrode during
the ECM process. Dar-Yuan Chang and Shu-Yi Lin (2012) have concluded that microdrilling is
an ssential process in the electronics, aviation, and semiconductor industries. Since micro-drills
have low rigidness and a high aspect-ratio, precise drilling parameters are required to prevent tool
breakage from excessive thrust force or torque. They have made an attempt to machine the
alumina ceramic to investigate the effects of drilling parameters on hole characteristics. Rajarshi
Mukherjee and Shankar Chakraborty (2012) concluded that electrochemical machining
(ECM) has become one of the most potential and useful non-traditional machining processes
because of its capability of machining complex and intricate shapes in high-strength and heat-
resistant materials. For effective utilization of the ECM process, it is often required to set its
different machining parameters at their optimal levels. Fan et al. (2012) investigated the
influences of working parameters of EMM, such as pulsed duration, applied voltage, pulse
frequency,electrolyte concentration, tool feed rates, and hole depth, on the hole overcut. Jain et al
(2012) studied the effects of process parameters such as voltage, electrolyte concentration, pulse
duty cycle, and feed rate on the machined hole diameter. Tang and Yang (2013) observed that,
given the same voltage, with an increasing cathode feed rate, the MRR was shown to increase
while the surface roughness value and the side gap decreased. Under the same cathode feed rate,
the MRR decreases, while the side gap and the surface roughness increase as the electrochemical
machining application voltage increases.
3. PROBLEM FORMULATION
It is evident from the literature survey that only a few researchers have studied the performance of
EMM on AMCs. Considering these requirements, an EMM set-up was developed. The literature
survey also points out that not much attention has been paid to study the electrochemical micro-
machining on AMCs. Most of the methods presented in the literature increase the complexity of
the computational process for drilling optimum machining parameters and therefore it cannot be
easily understood by engineers with limited statistical skills. So, it is required to find some
methodologies to handle the existing complexity in solving single- and multi-response problem.
Therefore, this research work mainly focuses on the effects of the influencing process parameters
of EMM such as machining voltage, electrolyte concentration, frequency on the overcut and
Material Removal Rate (MRR) of five different AMCs through Taguchi methodology and grey-
relational analysis has been investigated experimentally. The fabricated AMCs cover the
following application areas: piston ring, channels for micro reactors, nozzle plate for ink-jet
printer head, cylinder liner, connecting rod.
4. PROPOSED WORK
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The need for further studies arises with the aim of throwing more light on the possible
commercialization of the technology. With due consideration to these
requirements, an EMM set-up was developed and the influence of the various process parameters
such as pulse on-time, voltage, current and electrolyte concentration on machining rate and
overcut. EMM setup is developed for producing micro-holes in AMCs with the objective of
minimizing overcut (µm) and maximizing of the Material Removal Rate (mg/min). In order to
achieve this objective, the following works have been carried out in this research work. These are
to:
• Manufacture the following five different AMCs through Stir casting method;
Al 6061 - 6 % wt of Gr ; Al 6061 - 5 % wt of SiC p – 5 % of Gr;
Al 6063 – 10 % wt of TiC; Al 6063 - 10 % wt of SiCp;
Al 6063 - 10 % wt of SiCp – 5 % of B4C;
Study the micrograph and hardness of AMCs;
• Develop an EMM setup;• Conduct experiments for studying the effect of process parameters;
• Optimize the process parameters through Taquchi methodology and grey-relational analysis.
5. CONCLUSION
Thus in this paper I conclude with the study of various reviews related ECM experiments on
stainless steel and some on AMCs, but not much involvement in EMM studies.
Hence,experimental studies were carried out for optimal settings of machining parameters for
EMM on AMCs. The machine set-up has been developed and preliminary experiments conducted.
Based on the preliminary experimental results, the ranges and levels were identified and detailed
studies carried out. The effect of process parameters on EMM has been investigated
experimentally for all the five AMCs using Taguchi and grey-relational analysis.
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