Tribological behavior of Ti6Al4 V alloy swing against UHMWPE under different lubrication. (May 2022)

• Record Type: Journal Article
• Authors: Zhang, Xinyue; Chen, Kai; Xu, Linmin; Qi, Jianwei; Luo, Yong; Zhang, Dekun
• Is Part Of: Journal of thermoplastic composite materials. Volume 35:Number 5(2022)
• Page Start: 740
• Page End: 757
• Publication Date: 2022-05
• Subjects: Ti6Al4V/UHMWPE -- swinging -- lubrication -- wear mechanism; Thermoplastic composites -- Periodicals; 668.423
• DOI: 10.1177/0892705719881180
• Languages: English
• ISSNs: 0892-7057

Abstract

Friction and wear tests were performed in this study between the Ti6Al4 V socket and ultrahigh molecular weight polyethylene (UHMWPE) ball on swinging friction tester to clarify the wear mechanism of Ti6Al4V/UHMWPE friction pair under different conditions, including dry condition, simulated body fluid (SBF), and fetal bovine serum (FBS). Results showed that there are many scratches in different depths on the edge of the Ti6Al4 V socket, which reveals the characteristic of swinging friction, and the wear severity of the scratches was the worst under dry friction. What is more, the wear mechanism models under different lubrication conditions have been established. The wear mechanism of Ti6Al4 V alloy is mainly a combination of abrasive and oxidation wear, whereas the wear mechanism of UHMWPE is a combination of adhesive and abrasive wear. Compared with the dry friction condition, the friction coefficient and wear rate decreased under SBF and FBS lubrication conditions, and the wear mechanisms presented primarily adhesive wear combined with minimal oxidation wear. Among the three conditions, the effects of reducing friction and improving lubrication showed the following tendency: FBS > SBF > dry condition.