Experimentation for Microhardness and Residual Stress in Gaseous Assisted Powder Mixed Near Dry Electric Discharge Machining.

EasyChair Preprint 3729

Abstract

: Electric discharge machining (EDM) is a process to machine very hard conductive metals with intricate shapes which are very difficult to machine by any other conventional method. A recent trend in manufacturing industry has brought in Gaseous assisted powder mixed near dry EDM (GAPMND-EDM) methodoly. This advanced version of EDM is not only much more efficient in terms of performance index but is also environmental friendly. In this study, an approach has been made for experimental comparison in GAPMND-EDM for different metallic powders (Al, Gr and Si) in terms of residual stress (RS) and microhardness (MH) of the machined EN-31 workpiece by using copper tool electrode. The RS decreased by 39.68% while the microhardness increased by 93.57% in GAPMND-EDM. Highest microhardness (MH) was 1235 Vickers hardness number (VHN) while lowest residual stress (RS) was 266 MPa.

Keyphrases: Gaseous, Microhardness, Near Dry EDM, metallic powder, residual stress

@booklet{EasyChair:3729,
  author    = {Sanjay Sundriyal and Vipin and Ravinder Singh Walia},
  title     = {Experimentation for Microhardness and Residual Stress in Gaseous Assisted Powder Mixed Near Dry Electric Discharge Machining.},
  howpublished = {EasyChair Preprint 3729},
  year      = {EasyChair, 2020}}