The research investigated the impact of process parameters namely; pulse on time, pulse‐off time and peak current on crucial factors such as material removal rate, surface roughness and micro‐hardness during the wire electrical discharge machining of inconel 718 alloy. The experimental trials were conducted by using a Taguchi L27 orthogonal array design method. The outcomes had observed an increase in pulse‐on time corresponds to elevated micro hardness by 6 % and material removal rate by 18 %, while the surface roughness decreases by 61 %. Conversely, surface roughness was increased by 50 % with change in pulse‐off time from 8 μs to 18 μs and peak current from 2 A to 4 A. The analysis of variance has observed pulse‐on time as the most influential parameter for material removal rate, surface roughness, and micro‐hardness which primarily associated with the formation of recast layer. The implementation of the multi‐objective ant‐lion optimization algorithm has successfully estimated the multiple pareto‐optimal points across the parameter levels and response values. Moreover, the integrated Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS)‐Multi‐objective ant‐lion optimization has facilitated the selection of the best optimal point from several pareto‐optimal points and aids in decision‐making process.
Joshi et al. (Wed,) studied this question.
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