Multi-Objective Optimization of Process Parameters for Powder Mixed Electrical Discharge Machining of Inconel X-750 Alloy Using Taguchi-Topsis Approach

The paper investigates the influence of boron carbide powder (B₄C) mixed in dielectric fluid on EDM of Inconel X-750 alloy. The process parameters selected as discharge current (I_p), pulse on time(T_on), pulse off time(T_off), boron carbide(B₄C) powder concentration to examine their performance responses on Material Removal Rate (MRR), Surface Roughness(Ra) and Recast Layer Thickness (RLT).In this study, o examine the process parameters which influence the EDM process during machining of Inconel X-750 alloy using combined techniques of Taguchi and similarity to ideal solutions (TOPSIS).Analysis of variance (ANOVA) was conducted on multi-optimization technique of Taguchi-TOPSIS. ANOVA results identified the best process parameters and their percentages. It developed the mathematical equation on Taguchi-TOPSIS performance characteristics results. The multi optimization results indicated that I_p and T_off are more significant parameters; V, and T_on parameters are less significant. Finally, surface structures were studied at optimized EDM conditions by using scanning electron microscope (SEM).