Effect of Powder-Suspended Dielectric on the EDM Characteristics of Inconel 625

Talla, Gangadharudu; Gangopadhyay, S.; Biswas, Chandan Kumar

doi:10.1007/s11665-015-1835-0

Cited by 67 publications

(33 citation statements)

References 34 publications

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“…4). As stated, the pyrolysis of dielectric results in diffusion of oxygen and carbon, which also results in the formation of hard carbides and oxides over the top layer of the machined workpiece [18]. All these factors resulted in achieving the best micro-hardness value at the 3 rd level of the process parameter.…”

Section: Resultsmentioning

confidence: 93%

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: Resultsmentioning

confidence: 93%

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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“…Therefore, copper, copperchromium and graphite were selected as tool electrodes with ø 12 mm and 40 mm length. The tool electrodes of copper-chromium, graphite and copper as shown in Figure 1 (a), (b) and (c) while the workpiece specimen after machining is shown in Figure 1 3 1385 °C 205-MPa 520-MPa 30%…”

Section: Methodsmentioning

confidence: 99%

“…In spite of the capability to the machine fundamentally any electrically conductive material, the applications of EDM is barred to a few industries, due to poor productivity and surface quality of machined components. In the past few years, researchers have advanced new modifications to EDM for improving its performance [2,3]. PMEDM has one of the progressivemethods in the flank of the augmentation of the capabilities of EDM.…”

Section: Introductionmentioning

confidence: 99%

“…machining effectiveness and SR. Reported that powder-mixed EDM clearly improved the responses as compared with conventional EDM. Talla et al [3], investigated the influence of various powders (aluminum, graphite, silicon) suspended dielectrics and machining parameters on EDM characteristics of Inconel-625. Found that powder properties play a vital role in changing the machining performance and the quality of the machined surface.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Machining Parameters on Performance Characteristics of Powder Mixed EDM of Inconel-800

Kumar¹,

Dhingra²

2018

Int. J. Automot. Mech. Eng.

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This research work explores the connection of machining parameters, i.e. peak current (I p), pulse on-time (T on), pulse off-time (T off), tool material (copper, copper-chromium, graphite) and powder particles (tungsten carbide, cobalt, boron carbide) on surface roughness (SR) for Inconel-800 superalloy in powder mixed electrical discharge machining process (PMEDM). The Box-Behnken design had been applied to design the experiments, and response surface methodology (RSM) was employed to cultivate the empirical models. Forty-six experiments were conducted as per Box-Behnken method of RSM. The results indicated that when current increases from 4 to 12 A, SR increases from 4.23 to 12.57 μm, while with the increase of T off from 30 to 60 µs, SR decreased from 9.23 to 7.10 μm. Results also indicated that copper as a tool electrode and boron carbide as a powder additive has significantly effect on SR. The predicted results based on developed models are found to be in good agreement with the experimental results reasonably well with the coefficient of determination 0.96 for surface roughness. Furthermore, certain machined specimens were analyzed using energy-dispersive x-ray analysis (EDX) and scanning electron microscope (SEM) techniques.

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“…To reinforce the concept of PMEDM, Gangadharudu et al tried powders with different thermo-electric properties as additives and reported that the process of adding powder additives enhanced the machinability [15]. Literature available shows that powders with varied concentration [16], particle size, density and different thermo-electrical properties of the powders [17] affect the performance of PMEDM, but very little study has been done on the effect of the property of work piece on the performance in PMEDM process.…”

Section: Introductionmentioning

confidence: 99%

Influence of thermo-electrical property of materials on Powder Mixed Electrical Discharge Machining

Jeavudeen¹,

Siddhi²,

Murugan³

2019

FME Transactions

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Powder Mixed Electrical Discharge Machining (PMEDM) is considered as one of the viable methods to machine the materials which are hard and tough but with appreciable thermo-electrical properties. In PMEDM, it has been established that machinability is enhanced by adding additives in the form of fine powders in the spark gap of EDM process. In this investigation, the role of the thermo-electrical properties of workpiece on PMEDM process has been studied. Materials with distinct thermoelectric property, namely Mild Steel and Aluminium are taken as workpiece with Alumina as additive powder for the PMEDM process. Experiments have been conducted with Taguchi L9 Orthogonal Array (OA) with Material Removal Rate (MRR) and Tool Wear Index (TWI) as responses. Gap current, duty cycle and flow rate of powder mixed dielectric liquid have been taken as process parameters at 3 levels with circular copper rod of 12 mm diameter as tool electrode. Determination of the influence of properties of the workpiece on the machinability has been performed using a custom made PMEDM setup. ANOVA and main effect plot of data means for the aforementioned conditions have been analysed. The results are noteworthy with significant influence of the properties of the workpiece on the machinability of PMEDM process.

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Effect of Powder-Suspended Dielectric on the EDM Characteristics of Inconel 625

Cited by 67 publications

References 34 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

Effects of Machining Parameters on Performance Characteristics of Powder Mixed EDM of Inconel-800

Influence of thermo-electrical property of materials on Powder Mixed Electrical Discharge Machining

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