Optimization of wear parameters and their relative effects on TiN coated surface against Ti6Al4V alloy

This study focuses the relation between the surface roughness, hardness and wear depth on the dry sliding environment. The wear performance of the hard TiN coated surface slides against the Ti6Al4V alloy was studied by considering the different parametric conditions. The wear maps clearly revealed the relative effects of the wear parameters and their influences on the wear mass loss and the coefficient of friction (COF). The initial surface roughness plays a major role in deciding the wear mechanism when sliding takes place. The SEM morphology and profile study on the worn surfaces clearly evident the wear mechanism. The Response Surface Methodology (RSM) confirms the feasible zone for the responses and it identified the optimal parameters of applied load 2.8 N and sliding velocity 0.25 m/s which leads to minimal responses for the composite desirability of 91.2%. (C) 2015 Elsevier Ltd. All rights reserved.