Multiresponse Optimization of Process Variables of Powder Mixed Electrical Discharge Machining on Inconel-600 Using Taguchi Methodology

In the present work, performance parameters for the machining of Inconel-600 using Powder Mixed Electrical Discharge Machining (PMEDM) have been optimized using the Taguchi methodology. Experiments have been conducted by the Taguchi L9 orthogonal array. Tungsten carbide powder particles have been used as a powder additive. Material removal rate (MRR) and tool wear rate (TWR) have been considered as a measure of machining performance with three different control parameters such as peak current, pulse on-time (Ton) and pulse off-time (Toff). The results indicated that the use of tungsten carbide as a powder additive particles significantly improved the response parameters, i.e. increases the material removal rate and reduces the tool wear rate as compared with the outcomes coming from without using powder additive in EDM oil. The results have been analyzed with and without powder mixed dielectric along with the confirmation tests. Surface characteristics of specimen have also been analyzed using Scanning Electron Microscope (SEM) and Energy Dispersive Spectrograph (EDS).