Technological Advancement in Electrical Discharge Machining with Powder Metallurgy Processed Electrodes: A Review

Beri, Naveen; Maheshwari, Sachin; Sharma, Chander Shekhar; Kumar, Anil

doi:10.1080/10426914.2010.512647

Cited by 92 publications

(39 citation statements)

References 65 publications

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“…Therefore, wire electro discharge machining (WEDM) is a thermo-electric process to machine hard to cut material of electrically conductive and gained popularity in machining complex shapes with desired accuracy and dimensions (Dhobe et al 2013). Several researchers (Beri et al 2010;Dhobe et al 2014) have attempted to improve the performance characteristics such as material removal rate (MRR), surface roughness, and surface and subsurface properties. But with full potential utilization, this process still not completely solved due to its complexity, stochastic nature, and number of process variables involved in this process.…”

Section: Introductionmentioning

confidence: 99%

Parametric optimization of MRR and surface roughness in wire electro discharge machining (WEDM) of D2 steel using Taguchi-based utility approach

Manjaiah

Laubscher

Kumar

et al. 2016

Int J Mech Mater Eng

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Background: This paper reports the effect of process parameters on material removal rate (MRR) and surface roughness (Ra) in wire electro discharge machining of AISI D2 steel. Findings: The wire electro discharge machining characteristics of AISI D2 steel have been investigated using an orthogonal array of design. The pulse on time and servo voltage are the most significant parameter affecting MRR and surface roughness during WEDM process. The simultaneous performance characteristics MRR and surface roughness was optimized by Taguchi based utility approach. The machined surface hardness is higher than the bulk material hardness due to the repetitive quenching effect and contained various oxides in the surface recast layer. Methods: The experiments were performed by different cutting conditions of pulse on time (T on ), pulse off time (T off ), servo voltage (SV) and wire feed (WF) by keeping work piece thickness constant. Taguchi L 27 orthogonal array of experimental design is employed to conduct the experiments. Multi-objective optimization was performed using Taguchi based utility approach to optimize MRR and Ra. Results: Analysis of means and variance on to signal to noise ratio was performed for determining the optimal parameters. It reveals that the combination of Ton3, Toff1, SV1, WF2 parameter levels is beneficial for maximizing the MRR and minimizing the Ra simultaneously. The results indicated that the pulse on time is the most significant parameter affects the MRR and Ra. Concludions: The melted droplets, solidified debris around the craters, cracks and blow holes were observed on the machined surface for a higher pulse on time and lower servo voltage. Recast layer thickness increased with an increase in pulse on time duration. The machined surface hardness of D2 steel is increased due to the repetitive quenching effect and formation oxides on the machined surface.

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Section: Introductionmentioning

confidence: 99%

Parametric optimization of MRR and surface roughness in wire electro discharge machining (WEDM) of D2 steel using Taguchi-based utility approach

Manjaiah

Laubscher

Kumar

et al. 2016

Int J Mech Mater Eng

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“…Even elements of powder samples also can be identified by making as pallets of the powder by compression and sintering process and use as an electrode [25]. Elementals of the materials subjected to electric discharge can be identified by this method without difficultly.…”

Section: Applications Of Electric Dischargementioning

confidence: 99%

Microelectric Discharge Plasma: Characterization and Applications

Subbu

Dhamodaran

Ramkumar

2012

Materials and Manufacturing Processes

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“…This figure also shows that, provided that a significant amount of heat is generated at the interface of the particles, the melting point of fine powder particles is likely to be achieved at those interfaces that cause the generation of a liquid phase at local areas. Once the liquid phase is formed, it will lead to the melting of the contact surface between particles [11]. At the same time, with the aid of the pressure applied to the compact, the liquid phase flows into the vicinal pores due to viscous flow and capillary force [12], which results in the disappearance of the interface between particles and fast densification of the compact (see Fig.…”

mentioning

confidence: 99%

A new densification mechanism of copper powder sintered under an electrical field

et al. 2015

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A new sintering mechanism is revealed for copper powder sintered under the influence of an electrical field and a force field during the formation of microcomponents. Analysis of the microstructure and grain boundary evolution of the sintered samples showed that the disappearance of the interface at contact areas between particles is a continuous process which involves new grain formation and grain refinement during this innovative microsintering process. The densification process is therefore different from what is known in a conventional powder sintering process

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Technological Advancement in Electrical Discharge Machining with Powder Metallurgy Processed Electrodes: A Review

Cited by 92 publications

References 65 publications

Parametric optimization of MRR and surface roughness in wire electro discharge machining (WEDM) of D2 steel using Taguchi-based utility approach

Parametric optimization of MRR and surface roughness in wire electro discharge machining (WEDM) of D2 steel using Taguchi-based utility approach

Microelectric Discharge Plasma: Characterization and Applications

A new densification mechanism of copper powder sintered under an electrical field

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