PARAMETRIC OPTIMIZATION IN MACHINING ON NIMONIC 75 ALLOY USING ELECTRICAL DISCHARGE MACHINING

Abstract

The increasing demands of machining of complex shape geometries and their high surface finish and has further
strengthened the need of non-traditional machining processes. Among various process, EDM has been explored
to large extent towing to surface finish and MRR are of crucial importance in the field of machining processes
.Taguchi’s optimization technique, in order to optimize the cutting parameters in EDM for super alloys. The
objective of the effect of EDM parameters on MRR, Surface finish for machining NIMONIC75 alloy. In this
present study super alloy is used as a work piece, copper or copper Alloy Like Brass used as a tool and distilled
water is used as a dielectric fluid For experimentation, Taguchi’s orthogonal array will be followed by ANOVA to
identify the most significant factor .This would followed by developing empirical relation and optimization study.
Nimonic75 (Nickel chromium base Alloys) is the most commonly used alloy. His basic chemical composition
is Ni,Cr,Ti,C,Si,Cu,Fe,and Mn. Nimonic75 is significantly stronger than other commercially pure nimonic whilst
still retaining the same stiffness and thermal properties. Nimonic75 extensively used in Gas-turbine engines Heattreating equipment and fixtures Nuclear engineering aerospace, medical, marine and chemical processing.