Multi Objective Optimization Using Vikor Approach During Turning Of Ti6Al4V-ELI

Abstract

This paper investigates the influence of cutting process parameters on the surface roughness and average flank wear of tool insert during turning of titanium alloy Ti-6Al-4V ELI    ( Extra Low Interstitial)  in dry environment by using PVD AlTiN insert and uncoated insert. L18 orthogonal array design of experiment was used. Turning parameters were selected for machining such as cutting speed (80, 125, 170 m/min), feed (0.08, 0.15, 0.2 mm/rev) and depth of cut 0.5 mm constant. PVD AlTiN insert and uncoated K313 insert were used for turning of Ti6al4V ELI. Experimental data were analyzed and determined VIKOR index.  Lowest VIKOR index gives the optimal parameters. Optimum parameters are Vc: 125 m/min; f: 0.08 mm/rev; Tool insert: PVD AlTiN.