Ti6Al4V合金在Saline溶液中的扭动微动磨损（英文）  

Torsional Fretting Wear of Ti6Al4V Alloys in Saline Solutions

作　　者：林修洲[1] 蔡振兵[2] 易敬华[2] 崔学军[1] 窦宝捷 朱旻昊[2,3] Lin Xiuzhou;Cai Zhenbing;Yi Jinghua;Cui Xuejun;Dou Baojie;Zhu Minhao(Materials Corrosion and Protection Key Laboratory of Sichuan Province, Sichuan University of Science & Engineering, Zigong 643000, China;Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu 610031,China;School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031,China)

机构地区：[1]四川理工学院材料腐蚀与防护四川省重点实验室,四川自贡643000 [2]西南交通大学材料先进技术教育部重点实验室,四川成都610031 [3]西南交通大学材料科学与工程学院,四川成都610031

出　　处：《稀有金属材料与工程》2019年第6期1742-1748,共7页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(U1633118,U1530136,51575459);Foundation of Youth Science and Technology Innovation Team of Sichuan Province(2016TD0024,2017TD0017);Talent Introduction Funds of the Sichuan University of Science and Engineering(2016RCL12);Open Foundation of Key Laboratory of Advanced Technologies of Materials,Ministry of Education,China

摘　　要：在球/面接触中存在4种微动模式,即切向、径向、转动和扭动微动,在生理介质中扭动微动是人工关节失效的主要原因之一。成功建立了一种可在恒温液体介质中实现球/面接触扭动微动的新的试验系统。利用该系统,在37℃的Saline溶液中进行了钛合金/二氧化锆陶瓷球的扭动微动试验,详细讨论了扭动微动的运行行为和损伤机理。结果表明,扭动微动动力学行为在很大程度上取决于扭动角位移振幅和周期数。研究建立了扭动微动运行工况图(RCFM),包括3个区域,即:部分滑移区(PSR),混合区(MFR)和完全滑移区(SR)。在部分滑移区,接触中心没有发现任何损伤,接触边缘上只观察到轻微的擦伤和磨损。在混合区,损坏区域从接触边缘向中心扩展,接触中心无损伤,接触边缘区域出现氧化磨损和损伤。在滑移区,整个接触区域均发生损伤,损伤机理主要是磨蚀磨损、氧化磨损、和粘着磨损。Four fretting modes exist in ball-on-flat contact according to the direction of relative motion, i.e. tangential, radial, rotational, and torsional fretting. Torsional fretting in a physiological medium is one of the main reasons for artificial joints fail. A new test system was established for torsional fretting in a liquid medium at a constant temperature in a torsional mode with a ball-on-flat contact. The torsional fretting experiments were conducted using titanium alloys/zirconium dioxide ceramic balls in a saline solution at 37 °C, and the torsional fretting running behaviors and damage mechanisms were discussed. The results show that the dynamics behaviors are strongly dependent upon the torsional angular displacement amplitude and the number of cycles. A running condition fretting map(RCFM) is established, which includes 3 fretting running regimes: a partial slip regime(PSR), a mixed fretting regime(MFR), and a slip regime(SR). No damage is observed at the contact center and only slight scratch and wear are observed on the contact edge of PSR. The damage zone extends to the contact center and the sticking zone(without damage) contracts to the contact center as the number of cycles increases, and some oxidation wear and damage occur on the contact edge of MFR. The damage mechanisms are primarily abrasive wear, oxidation wear and adhesion wear in the SR.

关 键 词：微动磨损 扭动微动 钛合金 Saline溶液 

分 类 号：TG146.23[一般工业技术—材料科学与工程]