Surface Roughness and Microhardness Evaluation for EDM with Cu–Mn Powder Metallurgy Tool

Gill, Amoljit Singh; Kumar, Sanjeev

doi:10.1080/10426914.2015.1070412

Cited by 84 publications

(27 citation statements)

References 29 publications

(22 reference statements)

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“…There was an improvement in the EDM performance on machining of Ti-6Al-4V by dispersing SiC particles (abrasives) in the dielectric medium with magnetic stirring mechanism [5].Other researchers successfully achieved improved hardness of the specimen surface due to the formation of TiC and TiSi 2 . A Cu-Mn tool made with powder metallurgy was used for machining die steel with the EDM process utilizing the Taguchi technique [6]. Microhardness was increased substantially for the machined samples under optimum experimental conditions.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Micro-hardness of EN-31 Die Steel in a Powder-Mixed Near-Dry Electric Discharge Machining Method

Sundriyal

Vipin

Walia

2020

SV-JME

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The Powder-Mixed Near-Dry Electric Discharge Machining (PMND-EDM) methodology has proven to be efficient in terms of machining rate, surface morphology, and environmental friendliness, unlike traditional EDM. In this study, the presence of a conductive metallic powder (zinc) in the dielectric medium was responsible for changing the topography of the workpiece (EN-31) and resulted in a higher micro-hardness value of the machined component. In this research, an approach has been made to optimize the significant process parameters by using a Taguchi L9 orthogonal array (OA) to obtain machined components with higher values of micro-hardness, which was measured in terms of Vickers hardness HV. The selected process parameters were tool diameter, mist flow rate, metallic powder concentration, and dielectric mist pressure. By introducing foreign particles (metallic powder), the topography of the machined products has been improved, and the micro-hardness value was found to be enhanced. The confirmation experiment was performed for optimal process parameter settings, and the enhanced microhardness value was found to be 506.63 HV in the machined EN-31 die steel.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Micro-hardness of EN-31 Die Steel in a Powder-Mixed Near-Dry Electric Discharge Machining Method

Sundriyal

Vipin

Walia

2020

SV-JME

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“…In order to prevent the formation of surface cracks, high roughness and thick recast layer during EDM, number of advancements in EDM process has been employed by many Downloaded by [George Mason University] at 06: 41 22 June 2016 researchers such as Ultrasonic Vibration Assisted EDM (UVAEDM) [20], Rotary Assisted EDM (RAEDM) [21], HyFlex EDM [22], Electro Discharge Coating/surface modification by composite or green tool electrode [23][24][25][26][27][28], Near Dry EDM [29] and Powder Mixed EDM (PMEDM) [30][31][32][33][34][35][36]. Among them, PMEDM has been considered the most promising approach to enhance the surface quality by reducing surface crack density [37].…”

mentioning

confidence: 99%

Experimental investigations in powder mixed electric discharge machining of Ti–35Nb–7Ta–5Zrβ-titanium alloy

Prakash

Kansal

Pabla

et al. 2016

Materials and Manufacturing Processes

176

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The present research is the first type of study, in which the application of powder mixed electrical discharge machining (PM-EDM) for the machining of β-phase titanium (β-Ti) alloy has been proposed. β-Ti alloys are new range of titanium alloys, which has wide spread application in dental, orthopaedics, shape memory, and stents. The aim of the present study is to fabricate submicro-and nano scale topography by PMEDM process to enhance the biocompatibility without affecting machining efficiency. The effect of Si powder concentration along with pulse-current and duration on the surface and machining characteristics has been investigated. A significant decrease in surface crack density on the machined surface with 4 g/l Si powder concentration was observed. When β-Ti alloy was modified at 15 A pulse-current, longer pulse interval with 8 g/l concentration of Si powder particles, the interconnected surface porosities with pore size 200-500 nm was observed. Moreover, at Si powder concentration of 2 and 4 g/l, the recast layer thickness is 8µm and 2-3 µm, respectively. Elemental mapping analysis confirmed that PMEDM also generated carbides and oxides enriched surface, a favourable surface chemistry to enhance the biocompatibility of β-Ti alloy. Furthermore, Downloaded by [George Mason University] at 06:41 22 June 2016 2 PMEDM also enhances the machining performance by improving MRR and reducing TWR.

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“…The residual stress developed on the machined surface is measured by means of X-ray diffraction. The XRD was performed on Malvern PANalytical X'Pert 3 Powder Machine.…”

Section: Constantmentioning

confidence: 99%

Modeling of Residual Stress and Surface Damage of AISI 4340 using Copper Tungsten T ool in Die S inking EDM

Rizvi*,

Bharti,

Agarwal

2019

IJEAT

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The present work concentrates on the modeling of the residual stress and cracks induced during the machining of AISI 4340 in die-sinking EDM. Response surface methodology with rotatable central composite design is used with peak current, pulse on duration, voltage and pulse duty factor as process parameters. The relation between these process parameters and induced residual stress and cracks is established. The results of ANOVA elucidates that the present model is significant. Voltage and pulse on time are observed to have major dominance on residual stress. The SEM images reviled that micro-cracks resulted from the thermal stresses developed during machining of the workpiece. At higher levels of pulse on duration, wider cracks are observed due to high thermal gradients.

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Surface Roughness and Microhardness Evaluation for EDM with Cu–Mn Powder Metallurgy Tool

Cited by 84 publications

References 29 publications

Experimental Investigation of the Micro-hardness of EN-31 Die Steel in a Powder-Mixed Near-Dry Electric Discharge Machining Method

Experimental Investigation of the Micro-hardness of EN-31 Die Steel in a Powder-Mixed Near-Dry Electric Discharge Machining Method

Experimental investigations in powder mixed electric discharge machining of Ti–35Nb–7Ta–5Zrβ-titanium alloy

Modeling of Residual Stress and Surface Damage of AISI 4340 using Copper Tungsten T ool in Die S inking EDM

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