In-situ fabrication of gradient titanium oxide ceramic coating on laser surface textured Ti6Al4V alloy with improved mechanical property and wear performance

• Published in: Vacuum Vol. 176; p. 109327
• Main Authors: Yuan, Shuo, Lin, Naiming, Zou, Jiaojuan, Lin, Xiuzhou, Liu, Zhiqi, Yu, Yuan, Wang, Zhenxia, Zeng, Qunfeng, Chen, Wengang, Tian, Linhai, Qin, Lin, Xie, Ruizhen, Li, Boqiong, Zhang, Hongxia, Wang, Zhihua, Tang, Bin, Wu, Yucheng
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.06.2020
• Subjects: Laser surface texturing; Thermal oxidation; Ti6Al4V alloy; Tribological behavior; Wear mechanisms; Laser surface texturing; Wear mechanisms; Tribological behavior; Thermal oxidation; Ti6Al4V alloy
• ISSN: 0042-207X; 1879-2715
• DOI: 10.1016/j.vacuum.2020.109327

In this work, a duplex treatment of laser surface texturing (LST)-thermal oxidation (TO) was conducted on Ti6Al4V alloy to improve its mechanical property and wear performance. Microstructure, bonding strength, microhardness and nanoindentation behavior of the TO-Ti6Al4V were characterized. A comparative appraisal of wear performance for related samples of original Ti6Al4V, LST-Ti6Al4V, TO-Ti6Al4V and duplex treated-Ti6Al4V (DT-Ti6Al4V) were performed under dry sliding condition. The results revealed that gradient titanium oxide coatings with a thickness of 17 μm were in situ fabricated on the surface of Ti6Al4V and textured Ti6Al4V. The content of O displayed a gradient distribution across the TO-coating. TO treatment has improved the surface hardness and elasticity modulus of the Ti6Al4V. The specific wear rate of the samples was sorted in the following sequence: DT-Ti6Al4V < TO-Ti6Al4V < LST-Ti6Al4V < Ti6Al4V, which indicates that DT-Ti6Al4V exhibited the most excellent wear performance. It was confirmed that Ti6Al4V could obtain promisingly enhanced wear performance by taking advantages of LST and TO treatment. •Laser surface texturing (LST) was conducted on Ti6Al4V.•Thermal oxidation (TO) coating was prepared on Ti6Al4V and textured Ti6Al4V.•LST-TO duplex treatment improved the mechanical property and wear performance.