Title: Laser surface texturing and tribological behaviour under solid lubrication on titanium and titanium alloy surfaces

Authors: Wenhui Cao; Tianchang Hu; Hengzhong Fan; Litian Hu

Addresses: State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China ' State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, China ' State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, China ' State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, China

Abstract: Surface textures with dimple and groove were fabricated on titanium and its alloy surfaces by a Nd:YAG pulsed laser. The effect of laser parameters on the two types of texture morphologies was investigated. The unidirectional sliding tests were carried out for the Ti6Al4V surface under solid lubrication conditions and the effect of dimple density from 5% to 30% was examined. The results show that laser parameters have a significant effect on the size and depth of texture for titanium and its alloy surfaces. Comparing with the untextured surface, the longevity of solid lubricant film on the textured surface is prolonged by 90% at least. The beneficial effect of dimples is to act as solid lubricant reservoirs under solid lubrication.

Keywords: titanium; titanium alloy; laser parameters; surface texture; friction; solid lubrication; wear.

DOI: 10.1504/IJSURFSE.2021.114347

International Journal of Surface Science and Engineering, 2021 Vol.15 No.1, pp.50 - 66

Received: 25 May 2020
Accepted: 03 Sep 2020

Published online: 12 Apr 2021 *

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