Study of controlling parameters during electro-discharge machining of titanium alloy using grey relation analysis coupled with Taguchi philosophy

Abstract

Titanium grade 4 is a widely used material in the manufacturing industry due to its properties like high strength to weight ratio, low density, high-temperature resistivity, high corrosiveness. But due to its high strength, it is hard to machine in conventional machines. So here a different approach is shown to machine Titanium. Electro-discharge machine(EDM) is used for machining this metal. In this research work, an investigation is done to find the set of process parameters (peak current, gap voltage, pulse on time) for which responses like metal removal rate will be highest, but electrode wear rate and surface roughness is least. Optimization is done using Grey relation analysis coupled with Taguchi philosophy.