Study of wire-electrical discharge machining parameters of titanium alloy by using taguchi method

Abstract

Machining of Titanium alloys is difficult due to their chemical and physical properties namely excellent strength, chemical reactivity and low thermal conductivity. Traditional machining of such materials leads to formation of continuous chips and tool bits are subjected to chatter which leads to formation of poor surface on machined surface. In this study, Wire-EDM one of the most popular unconventional machining process which was used to machine such difficult-to-cut materials. Effect of Wire-EDM process parameters namely peak current, pulse-on-time, pulse-off-time, servo voltage on MRR and SR was investigated by Taguchi method. 0.25 mm brass wire was used in this process as electrode material. A surface roughness tester (Surftest 301) was used to measure surface roughness value of the machined work surface. A multi-response optimization technique was then utilized to optimize Wire-EDM process parameters for achieving maximum MRR and minimum SR simultaneously.

Effect of Al2TiO5 powder coating on the tribological, corrosion and mechanical properties of AISI 316L stainless steel

“…Then the relative proximity index of each alternative to the ideal solution called as closeness coefficient is computed by the ratio of the positive solution to the sum of ideal solutions (table 7(b)). The closeness coefficients are analyzed by standard Analysis of means (table 8) and Analysis of variance (table 9) based on the methodology suggested by Taguchi [16][17][18][19][20][21][22].…”