An Experimental investigation of different electrode on INCONEL718 using EDM
Keywords:
EDM, TWR, SR, DOE, ANOVA, TAGUCHI methodAbstract
Electro Discharge Machining (EDM) is an electro-thermal non-traditional machining Process, EDM is
mainly used to machine difficult-to-machine materials and high strength temperature resistant alloys. Electrical
discharge machining performance is mainly find out on the basis of Material Removal Rate (MRR), Tool Wear Rate
(TWR) and Surface Roughness (SR). The important EDM machining parameters affecting on the performance
parameters are Discharge current, pulse on time, pulse off time, voltage, arc gap, flashing pressure and duty cycle.
The Workpiece material selected in this work is INCONEL718 is a High Strength, Temperature Resistant (HSTR)
Nickel based super alloy. The tool material are Aluminium, Copper and Brass. The input variable parameters are
current, pulse on time and pulse off time. Taguchi Method is applied to create an L9 orthogonal array of input
variables and ANOVA is used to optimize the parameters using MINITAB 17 software.