Friction and wear behavior of commercially pure titanium TA1 at high temperature

Abstract

The plastic shear resistance of commercially pure titanium (TA1) surface is low and the protective effect of oxide film is limited. Serious wear behavior will occur during sliding friction. The friction and wear behavior of TA1 disc treated by high temperature oxidation was studied by means of high temperature friction and wear tester, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS).The results show, because of the lubrication effect of abrasive debris, under the same load and wear time, the friction coefficient of TA1 with oxide layer ranges from 0.07 to 0.3, and that of TA1 without oxide layer ranges from 0.55 to 0.9.The higher the friction and wear test temperature is, the more and deeper the furrow morphology distribution is at the friction area of TA1 with oxidation layer. For TA1 specimens without oxide layer, with the increase of temperature and the prolongation of grinding time, cracks are easier to propagate and form delamination wear. The main wear modes of TA1 material are delamination wear, adhesion wear and oxidation wear. The adhesion wear of TA1 material without oxide film and oxygen-rich layer is more serious. Different surface hardnesses and wear mechanisms result in different friction and wear properties at high temperature.

Keywords

• commercially pure titanium
• friction coefficient
• oxygen-enriched <i>α</i> layer
• friction and wear