Multi-response Optimization of Wire EDM of Inconel 718 Using a Hybrid Entropy Weighted GRA-TOPSIS Method

The current work demonstrates a novel multi-criteria decision-making (MCDM) technique to optimize the process parameters during wire electric discharge machining of Inconel 718. A hybrid GRA-TOPSIS algorithm using entropy weights is developed processes for maximizing cutting speed and simultaneously minimizing surface roughness flatness error. Experiments were conducted according Taguchi L18 orthogonal array considering pulse on time, off servo voltage, feed rate, electrode types as input parameters. each responses calculated by method. different alternatives ranked technique, an optimum parameter combination found that maximizes outcome. analysis variance (ANOVA) was performed study relative significance performance index. results finally validated performing confirmation tests. weighted method observed improve overall compared conventional TOPSIS. Microstructural analysis, morphological studies, EDS integrity machined under optimal settings.