Author:

Keywords:

biomedical Ti alloy, tribocorrosion, wear, electrochemistry, surface micro topography, sem morphology, fretting-corrosion behavior, electrochemical techniques, cp ti, titanium, Ti6Al4V, Science & Technology, Technology, Physical Sciences, Materials Science, Multidisciplinary, Optics, Materials Science, Biomedical Ti alloy, Tribocorrosion, Wear, Electrochemistry, Surface micro topography, SEM morphology, FRETTING-CORROSION BEHAVIOR, ELECTROCHEMICAL TECHNIQUES, CP TI, TITANIUM, TI6AL4V, WEAR, biomedical ti alloy, ti6al4v, Optoelectronics & Photonics

Abstract:

The tribocorrosion behaviour of untreated Ti-6Al-4V alloy in artificial saliva solution was evaluated based on the change in open circuit potential (OCP) measured as a function of time. The experiments were performed using a unidirectional reciprocating fretting experimental set-up which was mechanically and electrochemically instrumented, under various solicitation conditions. The effect of applied normal force on corrosion-wear of the tested material was determined. Before the onset of fretting a large increase of the OCP in the noble direction for the Ti-6Al-4V alloy was observed. With the onset of fretting it was observed a cathodic shift in OCP, shift which decreases linearly with increasing normal load. The restoration ability of Ti-6Al-4V alloy after the passive films damaged during fretting was observed when the fretting motion has ceased. A decrease in friction coefficient with gradually increasing load was observed.