Investigation of Micro-Hardness in Electrical Discharge Alloying of En31 Tool Steel with Cu–W Powder Metallurgy Electrode

Gill, Amoljit Singh; Kumar, Sanjeev

doi:10.1007/s13369-017-2960-x

Cited by 17 publications

(10 citation statements)

References 31 publications

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“…Analysis of variance (ANOVA) was utilized along with empirical model for the optimization and prediction of micro-hardness. The Taguchi method was followed to obtain a combination of six process variables for achieving the best microhardness [11]. Under favourable conditions for microhardness, noteworthy enhancement in the percentages of carbon and tungsten was observed.…”

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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“…The mixture has then compacted the use of hydraulic compaction press potential 40 ton in a die 40 mm diameter, where the load and dwell time were maintained at 482 MPa and 15 min two respectively. Finally, the compacted specimens were allowed to get sintered beneath argon surroundings of 800-950 C at 10 C/min for 2 hrs by means of a vacuum furnace and then allowed to cool down inside the furnace till the room's ordinary temperature is attained [13]. Experimental outcomes confirmed that adding WC should effectively improve the thermal conductivity and increase the bonding between Silicon carbide and Copper.…”

Section: Methodsmentioning

confidence: 88%

WEDM of Cu/WC/SiC composites: development and machining parameters using artificial immune system

Meenakshi¹,

Suresh²

2019

Journal of Experimental Nanoscience

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A systematic read on evaluating the machining characteristics of wire cut electrical discharge machining (WEDM) using analysis of variance (ANOVA) and multilinear regression model based multi objective optimization is provided during this analysis article. The current work explores, the surface roughness of copper metal matrix composite (MMCs) is minimized by optimizing the process parameters like spark on time, spark off time, peak current and wire feed. Taguchi's L9 orthogonal array has been used to conduct the experiments for two samples having a different composition to measure the surface roughness. The order of significance of parameters on surface roughness (Ra) for sample 1 and 2 MMCs were found using ANOVA and a multilinear regression model (MLRM) was developed to predict the Ra value. The new contribution in the present work is that, the coefficients of MLRM were optimized using artificial immune system algorithm with the objective of minimizing the mean absolute percentage error. Finally, the optimum process parameters were obtained to minimize the surface roughness and reported that the reduced value of Ra for 2.5% and 5% WC Copper MMCs were 0.9 lm and 1.1 lm, respectively later which were established by confirmation experiments.

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“…Thus, carbide compound that is formed gets deposited over the surface increasing the layer strength, which results in an increase in MH. 36 When POFF was increased from 25 µs to 65 µs, MH started to decline from 165. 82 HV to 125.…”

Section: Resultsmentioning

confidence: 99%

Study of surface crack density and microhardness of Aluminium 6061 alloy machined by EDM with mixed powder and assisted magnetic field

Rouniyar

Shandilya

2021

Journal of Micromanufacturing

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Magnetic field assisted powder mixed electrical discharge machining (MFAPM-EDM) has emerged as hybrid electrical discharge machining (EDM) technique which improves machining performance by the addition of powder in dielectric and under the influence of magnetic field. In the present article, Aluminium 6061 alloy was machined through fabricated MFAPM-EDM set-up considering the one-parameter-at-a-time method. The individual effect of process parameters, namely pulse on duration (PON), pulse off duration (POFF), discharge current (IP), magnetic field strength (MF) and powder concentration (PC) on surface crack density (SCD) and micro hardness (MH) has been studied. Pulse on duration was observed as the most dominating process parameter accompanied by peak current, powder concentration and magnetic field for both SCD and MH. Lower SCD (0. 0063 µm/µm 2 ) and higher MH (188. 21 HV) on machined surface were observed at PON= 90 µsec, POFF=45 µsec, IP=13 A, PC =10 g/l and MF= 0. 3 T. Machining of AA6061 with MFAPM-EDM process revealed 85% and 76% improvement in SCD and MH, respectively. XRD analysis witness an increase in MH due to the presence of oxide as well as carbide layer on machined surface.

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Investigation of Micro-Hardness in Electrical Discharge Alloying of En31 Tool Steel with Cu–W Powder Metallurgy Electrode

Cited by 17 publications

References 31 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

WEDM of Cu/WC/SiC composites: development and machining parameters using artificial immune system

Study of surface crack density and microhardness of Aluminium 6061 alloy machined by EDM with mixed powder and assisted magnetic field

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