Experimental and statistical investigation into micro-EDM of Hastelloy-X using PVD diamond-coated and AlTiN-coated tungsten carbide electrodes

Asma Perveen, M. P. Jahan

Research output: Contribution to journalArticlepeer-review

Abstract

This paper investigates the effectiveness of electrode coating during the micro-electro-discharge machining (micro-EDM) of a nickel-based Hastelloy X (Ni-X) using uncoated, physical vapour deposition (PVD) diamond-coated, and aluminium titanium nitride (AlTiN)-coated tungsten carbide tool electrodes. The Box-Behnken design (BBD) along with response surface methodology (RSM) was used for modelling the effect of different machining parameters, i.e., capacitance, voltage, tool rotational speed, and tool coating on the micro-EDM performance of Ni-X alloy. The micro-EDM performance was evaluated by machining time, tool wear, crater size and surface microhardness. Capacitance and voltage were found to have significant effect on machining time, tool wear and crater sizes. Increasing capacitance and voltage reduced the machining time as well as tool wear however, crater size was increased indicating rougher machined surface at higher capacitance and voltage settings.

Original languageEnglish
Pages (from-to)52-81
Number of pages30
JournalInternational Journal of Manufacturing Research
Volume16
Issue number1
DOIs
Publication statusPublished - 2021

Keywords

  • BBD
  • Box-Behnken design
  • Crater size
  • Hastelloy X
  • Machining time
  • Micro-EDM
  • Micro-hole
  • Ni alloy
  • Ni-X alloy
  • Response surface methodology
  • RSM
  • Surface microhardness
  • Tool coating
  • Tool wear

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Modelling and Simulation
  • Computer Science Applications
  • Industrial and Manufacturing Engineering

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