Multi-response Optimization of WEDM Process Parameters of Inconel 718 Alloy Using TGRA Method

It is very important and complexity to find the optimum values of wire EDM process parameters and contribution of each parameter to attain the better performance characteristics. In this study, an attempt has been made to optimize those parameters while machining the Inconel 718 alloy. Since the process involves more one than one response parameter, it is essential to carry out the multi-response optimization methodology. The experiments have been conducted with different levels of input factors such as pulse on time, pulse off time, servo voltage and wire tension based on Taguchi L9 orthogonal table. Wire EDM optimal process parameter has been identified using grey relational analysis and significant parameter has been determined by analysis of variance. The experimental results have indicated that the multi-response characteristic such as material removal rate and surface roughness can be improved effectively through grey relational analysis.