Multi-objective Optimization of Dry EDM with Inconel 718 Using Grey Relational Analysis

  • A. S. BhandareEmail author
  • U. A. Dabade
Conference paper
Part of the Lecture Notes in Mechanical Engineering book series (LNME)


In dry EDM machining, hollow electrodes are applied to supply gaseous medium at the machining zone. In this paper, an attempt has been made with L27 orthogonal array using compressed air as a dielectric medium, for Inconel 718 workpiece material and with copper tool electrode, to study and investigate the effects of machining parameters like as gas pressure, discharge current, pulse on time and gap voltage to optimize the output variables such as material removal rate (MRR), surface roughness (SR) and tool wear rate (TWR) based on Taguchi grey relational array. Analysis of variance (ANOVA) was carried out to find the significance of process parameters on grey relational grade. Gas pressure at level 2 (2 bar), current at level 1 (13 A), pulse on time at level 3 (200 µs) and gap voltage at level 3 (60 V) were found to be the optimum parameters for this process.


Dry electric discharge machining (Dry EDM) Material removal rate (MRR) Surface roughness (SR) Tool wear rate (TWR) Grey relational analysis Analysis of variance 


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© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringWalchand College of Engineering SangliSangliIndia

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