Optimisation of machining parameters of wire-cut EDM on super alloy materials–A review

Abstract

Wire-cut Electric Discharge Machining (WEDM) is an efficient machining process in numerous applications like space craft, defense, transportation vehicles, micro systems, farm machinery. It is used to machine conductive and hard materials like metal matrix composites, ceramic composites and super alloys. Super alloys exhibit excellent mechanical strength and creep resistance at high temperatures, good surface stability, and corrosion and oxidation resistance. The development of super alloys has primarily been driven by the aerospace and power industries. In this review of papers the optimization of WEDM machining parameters, responses by deploying different techniques like Taguchi Method, ANOVA, GRA, ANN, PCA. These techniques were utilized for examination of impact of wire-cut EDM process parameters on material removal rate (MRR) and surface roughness (SR) on super alloys. Parameters like pulse off time, pulse on time, servo voltage, peak current, kerf width are utilized to optimize the material removal rate (MRR) and surface roughness (SR). Taguchi orthogonal array was selected based on the process parameters. ANOVA is utilized for advancing parameters with the goal that greatest material removal rate and least surface roughness is acquired.