To Study the Effect of Polarity and Current during Electric Discharge Machining of Inconel 718 with CuW Powder Metallurgy Electrode

Electrical discharge machining (EDM) is one of the earliest non-traditional machining processes which have been widely used to produce dies, molds and finishing parts for aerospace and automotive industry. In recent years, powder metallurgy processed electrodes have found wide application as an alternative tooling for EDM. In the present experimental study an attempt has been made to study the effect of electrode polarity and current during electrical discharge machining of Inconel 718 alloy steel with copper tungsten (PM) processed electrode. The response parameters selected for the study are material removal rate (MRR) surface roughness (SR) Ra Value, tool wear rate (TWR) and Change in Surface Roughness (SR) Ra Value of electrode before and after machining.