Experimental investigation of electrode wear and rapidly re-solidified layer thickness in T90Mn2W50Cr45

This paper presents the relevance of standard Response surface methodology (RSM) for studying the effect of Electrode Wear (EW) and Rapidly Re-solidified Layer Thickness (RRLT) in the tool steel of T90Mn2W50Cr45 used in electrical discharge machining process. The process parameters Pulse on time, pulse off time, and pulse current were altered in the experiment. The Response surface methodology (RSM) is used for developing a mathematical model for the Electrode Wear and Rapidly Re-solidified Layer Thickness. The data obtained for Central Composite Rotatable Design (CCRD) has been used in mathematical model. The end result of Analysis of Variance (ANOVA) has been applied to verify the lack of fit and capability of the built-up models. The predicted and experimental values were quite close, which indicates that the developed model can be effectively used to predict the Electrode Wear and Rapidly Re-solidified Layer Thickness in the machining of tool steel of T90Mn2W50Cr45.