Effect of two strengthening processes on the fretting wear mechanism of CoCrMo alloy

被引：6
作者：
He, Jifan [1 ,2 ]
Li, Hongyang [1 ,3 ]
Lu, Jingfen [1 ]
Peng, Jinfang [4 ]
Liu, Jianhua [1 ]
Zhu, Minhao [1 ]
机构：
[1] Southwest Jiaotong Univ, Sch Mat Sci & Engn, Chengdu 610031, Peoples R China
[2] Southwest Jiaotong Univ, Sch Mech & Aerosp Engn, Chengdu 610031, Peoples R China
[3] Southwest Jiaotong Univ, Sch Mech Engn, Chengdu 610031, Peoples R China
[4] Southwest Jiaotong Univ, State Key Lab Rail Transit Vehicle Syst, Chengdu 610031, Peoples R China
来源：
TRIBOLOGY INTERNATIONAL | 2024年 / 192卷
基金：
中国国家自然科学基金;
关键词：
CoCrMo alloy; Ultrasonic surface rolling process; Solid solution treatment; Damage mechanism; BEHAVIOR; RESISTANCE; FRICTION; STRESS; DAMAGE; STEEL; PHASE;
D O I：
10.1016/j.triboint.2023.109216
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
To alleviate fretting damage of the artificial joint CoCrMo alloy, the substrate was treated by ultrasonic surface rolling process (USRP) and solid solution treatment (SST) respectively. Meanwhile, the fretting wear behavior and failure mechanism of the treated-samples were quantitatively analyzed via experimental study. Compared with the substrate, the wear rates of USRP and SST samples are reduced by about 8.895 and 13.463 mu m3/mJ in slip regime. In addition, the wear resistance of USRP samples is improved due to grain refinement, but the expanded grain boundary channels aggravate the oxidative wear degree (8.13% higher than substrate). The intergranular carbides are dispersed in grains and constructed into stacking faults through SST, hence, the fretting wear resistance of the alloy is greatly improved.
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页数：13
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