A Study on Wear Behaviour of Electrical Discharge-Coated Magnesium Alloy

Elaiyarasan, U.; Satheeshkumar, V.; Senthilkumar, C.

doi:10.1007/s40735-019-0222-z

Cited by 17 publications

(6 citation statements)

References 25 publications

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“…It was concluded that the coating layer thickness increased with increase in discharge current and pulse duration. Elaiyarasan et al [9] studied the wear behaviour of magnesium alloy coated with powder metallurgy electrode under different sliding condition. Sahoo and Bhaskar [10] optimized the electro discharge coat-ing process by desirability function technique.…”

Section: Introductionmentioning

confidence: 99%

Effect of sintered electrode on microhardness and microstructure in electro discharge deposition of magnesium alloy

Elaiyarasan

Satheeshkumar²,

Senthilkumar³

2020

Journal of the Mechanical Behavior of Materials

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In this study, an endeavour have been made to depositing the electrode materials over the surface of the magnesium alloy using electrical discharge machining (EDM) with WC-Cu powder compacted sintered electrode. Various process parameters such as compaction load, discharge current and pulse on time are selected to carry out the experiment in order to attain the maximum material migration rate (MMR) or deposition rate and microhardness (MH). It was concluded that the MMR and MH increased with increase in discharge current and pulse on time at low compacted electrode but it is decreased at lower discharge current and pulse on time. Highest MMR and MH were attained successfully at partial sintered low compaction load electrode. Microstructure evaluation has been carried out on deposited surface using scanning electron microscopy (SEM) and presence of electrode element in the deposited surface was confirmed by energy dispersive spectroscopy (EDS). Defects mechanism such as globules and craters are formed during EDC with high current and pulse on time respectively, which diminishes the surface roughness. It was observed that the compaction load is the influence parameter on the MMR and MH.

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Section: Introductionmentioning

confidence: 99%

Effect of sintered electrode on microhardness and microstructure in electro discharge deposition of magnesium alloy

Elaiyarasan

Satheeshkumar²,

Senthilkumar³

2020

Journal of the Mechanical Behavior of Materials

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“…The material deposition rate increased with the increase in the current, on-time and tool composition. Prakash et al (2019) [43] coated a composite layer of TiO2-TiC-NbO-NbC onto the Ti-64 alloy. It was noted that the high peak current and high Nb-powder concentration resulted in enhancement of material migration and a crack-free thick layer on the work-piece was obtained.…”

Section: Studies On Electrical Discharge Coating (Edc)mentioning

confidence: 99%

“…The surface hardness of the coating is enhanced. Elaiyarasan et al (2019) [43] investigated wear behavior of ZE41A magnesium alloy coated with WC/Cu by means of EDC. It was observed that that the wear rate and coefficient of friction increased with increment in normal load, sliding speed and sliding time.…”

Section: Studies On Electrical Discharge Coating (Edc)mentioning

confidence: 99%

“…It was observed that that the wear rate and coefficient of friction increased with increment in normal load, sliding speed and sliding time. Elaiyarasan et al (2019) [44] investigated the impact of the use of WC/Ni powder metallurgy tool on the ZE41A magnesium alloy by EDC. They noted that that the material deposition rate increased with increasing current and on-time.…”

Section: Studies On Electrical Discharge Coating (Edc)mentioning

confidence: 99%

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A Framework for Surface Modification by Electrical Discharge Coating using Variable Density Electrodes

2021

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Surface modification is the process of altering physical or chemical characteristics of the work-piece surface. In this paper, various surface modification techniques have been discussed. One of the most appropriate surface modification technique is electrical discharge coating (EDC), in which the hard material is made to deposit onto the work-piece in a state of reverse polarity condition. Different mechanisms of carrying out EDC are presented. Deliberate material transfer takes place by using electrodes or by dispersant of metal powders into the di-electric. A detailed review of the literature on the theme of surface modification through the EDC has been conducted. In last, a framework for conducting surface modification by EDC employing using density electrodes of same material is presented.

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“…EDM removes the unwanted material from workpiece by the series of electric spark supplied between the electrode and workpiece. While machining material the recast layer is formed in the machining zone, it is the common occurrence [2]. Formed recast layer contains high quantity of carbon content that directly affects the surface qualities such as roughness and hardness.…”

Section: Introductionmentioning

confidence: 99%

Effect of parameters on microstructure of electrical discharge coated ZE41A magnesium alloy with tungsten carbide-copper composite electrode

Elaiyarasan¹,

Satheeshkumar²,

Senthilkumar³

2021

Surf. Topogr.: Metrol. Prop.

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Electrical discharge coating is a material transfer process of EDM used for fabricating composite coating on the workpiece surface. It is applied in the several applications such as surface texturing, die and mould making industries in order to increase the wear and corrosion resistance. In this investigation, ZE41A magnesium alloy is coated with tungsten carbide- Copper (WC-Cu) powder metallurgy electrode. Electrodes are prepared under three different load conditions (150, 175 and 200 MPa). Effects of process parameters on microstructure of the coated surfaces are studied. EDC experiment is carried out by varying the process parameters viz. compaction load (CL), current (I) and pulse on time (Ton). Response characteristics considered in this study are material migration rate (MMR), layer thickness (LT) and micro hardness (MH). MMR, LT and MH increases with increase in current and pulse on time at low compaction loaded electrode. Conversely, it is decreased with low current and pulse on time at high compaction loaded. Average micro hardness of the deposited surface was 125 HV and average layer thickness was 91.6 μm. Different surface defects were identified in the deposited surface such as cracks, craters and globules. Bigger craters were observed at surface deposited with higher current (4 A) that reduced the hardness of the surface.

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A Study on Wear Behaviour of Electrical Discharge-Coated Magnesium Alloy

Cited by 17 publications

References 25 publications

Effect of sintered electrode on microhardness and microstructure in electro discharge deposition of magnesium alloy

Effect of sintered electrode on microhardness and microstructure in electro discharge deposition of magnesium alloy

A Framework for Surface Modification by Electrical Discharge Coating using Variable Density Electrodes

Effect of parameters on microstructure of electrical discharge coated ZE41A magnesium alloy with tungsten carbide-copper composite electrode

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