Page 128 - 《摩擦学学报》2021年第1期

第 41 卷 第 1 期 摩 擦 学 学 报 Vol 41 No 1
2021 年 1 月 Tribology Jan, 2021

DOI: 10.16078/j.tribology.2020064

位移幅值对铜镁合金微动磨损行为的影响

1,2
1
1*
1
袁新璐 , 李 根 , 张晓宇 , 蒲 建 , 任平弟 1
(1. 西南交通大学机械工程学院 摩擦学研究所，四川 成都 610031;
2. 中国石油西南油气田公司 输气管理处，四川 成都 610031)
摘 要: 在研制的多功能微动磨损试验机上，开展了不同位移幅值下铜镁合金微动磨损试验，以研究位移幅值对铜
镁合金微动磨损行为的影响. 微动过程中记录摩擦系数曲线与F t -D-N曲线，利用光学显微镜(OM)、扫描电镜(SEM)、
能量色散X射线光谱仪(EDS)及三维形貌仪对损伤区域进行了微观分析. 结果显示：随着位移幅值的增加，铜镁合金
微动运行状态由部分滑移进入完全滑移，未发现混合滑移状态；部分滑移区中呈现由弹性变形协调逐渐向塑性变形
协调转变的趋势. 磨损体积随位移幅值的增加而增加，在完全滑移区中体积损失非常严重. 在弹性变形协调的部分
滑移状态下，接触表面损伤轻微，而由塑性变形协调的部分滑移状态下，接触中心出现较大切应力，疲劳裂纹扩展
至接触表面导致材料剥落，接触边缘有磨粒磨损和氧化磨损的痕迹. 在完全滑移状态下，接触表面损伤主要为疲劳
剥层，磨粒磨损和氧化磨损.
关键词: 微动磨损; 铜镁合金; 位移幅值; 塑性变形; 疲劳剥层
中图分类号: TH117.1 文献标志码: A 文章编号: 1004-0595(2021)01–0125–12

Effect of Displacement Amplitude on Fretting Wear Behavior
of Copper - Magnesium Alloy

1
1*
1,2
1
YUAN Xinlu , LI Gen , ZHANG Xiaoyu , PU Jian , REN Pingdi 1
(1. Tribology Research Institute, School of Mechanical Engineering, Southwest Jiaotong University,
Sichuan Chengdu 610031, China
2. Gas transmission management office of Petro China Southwest Oil & Gasfield Company,
Sichuan Chengdu 610031, China)
Abstract: The effect of displacement amplitude on fretting wear behavior of copper-magnesium alloy was investigated.
Fretting tests of Cu-Mg alloy were carried out on a multi-function fretting wear rig under different displacement
amplitudes. The friction coefficient curve and F t -D-N curve were recorded during the fretting process, and the damage
area was analyzed by optical microscope, scanning electron microscope, energy dispersive X-ray spectrometer and three-
dimensional profiler. The results showed that with the increase of displacement amplitude, the fretting contact condition
changed from the partial slip regime to the gross slip regime, and the mixed slip state was not found. There was a
transformation from the elastic deformation coordination to the plastic deformation coordination in the partial slip
regime. The wear volume increased with the increase of displacement amplitude, in addition, the volume loss was very
serious in the gross slip regime. In the partial slip state coordinated by elastic deformation, the damage of the contact
surface was mild; while in the partial slip state coordinated by plastic deformation, high shear stress was produced in the
contact area, and fatigue cracks extended to the contact surface resulting in peeling of material, with traces of abrasive
and oxidative wear at the contact edge. In the gross slip regime, the contact surface damage mainly were fatigue

Received 16 April 2020, revised 28 April 2020, accepted 26 May 2020, available online 28 January 2021.
*Corresponding author. E-mail: zhangyu3035@126.com, Tel: +86-28-87603924.
This project was supported by the National Natural Science Foundation of China (U1534209, 51775459) and Sichuan Science and
Technology Program (2020YFG0135).
国家自然科学基金项目(U1534209, 51775459)和四川省重点研发项目(2020YFG0135)资助.