Electrical Discharge Machining studies on Monel- Super Alloy

In this work, the machinability effect of monel alloy is examined by varying the parameters of Electrical Discharge Machine (EDM). EDM operation is governed by Pulse ON time, pulse OFF time, discharge current and gap voltage and they are taken as independent parameters. Material Removal Rate (MRR) and Surface Profile (Ra) are taken as the dependent parameters. To predict the optimal condition, the experiments are conducted by using Taguchi's L27 orthogonal array. The influences of each independent parameter on the dependent parameters are analysed using multi functional grey relational analysis with the intension of increasing MRR with acceptable level of Ra. Through response table, optimized condition has been predicted. From ANOVA, it is identified that discharge current has a significant effect on MRR and Ra with a contribution of 71% and 81%, respectively. The experiment has been conducted to validate the optimal condition and it is found to be 99.1% acceptable level.