Dry Friction Characteristics of Ti-6Al-4V Alloy under High Sliding Velocity

作     者：邱明 QIU Ming~(1,2) ZHANG Yongzhen~3 ZHU Jun~2 YANG Jianheng~3 (1.School of Mechatronic Engineering,Henan University of Science and Technology,Luoyang 471003,China;2.Theory of Lubrication and Bearing Institute,Xi’an Jiaotong University,Xi’an 710049,China;3.School of Material Science and Engineering,Henan University of Science and Technology,Luoyang 471003,China)

作者机构：School of Mechatronic EngineeringHenan University of Science and Technology Theory of Lubrication and Bearing InstituteXi'an Jiaotong UniversityXi'an 710049China 

出 版 物：《Journal of Wuhan University of Technology(Materials Science)》 (武汉理工大学学报（材料科学英文版）)

年 卷 期：2007年第22卷第4期

页      面：582-585页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：the National Natural Science Foundation of China(No.50375046 and No.50432020) 

主　　题：Ti alloy dry sliding friction behavior contact temperature wear mechanism 

摘      要：Tribological behaviours of Ti-6Al-4V alloy pins sliding against GCr15 steel discs over a range of contact pressures （0.33-1.33 MPa） and sliding velocities （30-70 m/s） were investigated using a pin-on-disc tribometer under unlubricated conditions. The wear mechanisms and the wear transition were analyzed based on examinations of worn surfaces using SEM, EDS and XRD. When the velocity increases, the friction coefficient and the wear rate of the Ti-6Al-4V alloy show typical transition features, namely, the critical values of sliding velocities for 0.33 and 0.67 MPa are 60 and 40 m/s, respectively. The experimental results reveal that the tribological behaviours of Ti-6Al-4V alloys are controlled by the thermal-mechanical effects, which connects with the friction heat and hard particles of the pairs. A tribolayer containing mainly Ti oxides and V oxides is formed on the worn surface of Ti-6Al-4V alloy.