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An experimental investigation on fretting wear behavior of copper–magnesium alloy
Wear ( IF 5 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.wear.2020.203497
Xinlu Yuan , Gen Li , Xiaoyu Zhang , Jian Pu , Pingdi Ren

Abstract The fretting wear behavior of copper–magnesium alloy (Cu–Mg alloy) used for high-speed railway catenary system was investigated. Fretting tests of Cu–Mg alloy cylinder against Cu–Mg alloy cylinder at vertical cross contact configuration were carried out on a fretting wear rig at room temperature. The running condition fretting map (RCFM) composed of partial slip regime (PSR), gross slip regime (GSR), and mixed fretting regime (MFR) was constructed depending on different normal loads and displacement amplitudes. In PSR, only slight surface damage was detected on the wear scar. In MFR, the morphologies of the wear scar displayed a clear subdivision in the central stick zone and the surrounding annular slip zone. Fatigue cracks initiated and propagated at the boundary between the stick zone and slip zone. The damage mechanism is the combination of fretting fatigue and fretting wear which combines adhesion, surface fatigue and slight tribochemical reactions. In GSR, fretting wear is predominant. The wear mechanisms were mainly abrasion, surface fatigue and severe tribochemical reactions dominated by oxidation.

中文翻译:

铜镁合金微动磨损行为的试验研究

摘要 研究了高速铁路接触网系统用铜镁合金(Cu-Mg合金)的微动磨损行为。在室温下在微动磨损台上进行了垂直交叉接触配置下 Cu-Mg 合金圆柱体与 Cu-Mg 合金圆柱体的微动测试。根据不同的法向载荷和位移幅值构建了由部分滑动状态(PSR)、总滑动状态(GSR)和混合微动状态(MFR)组成的运行状态微动图(RCFM)。在 PSR 中,仅在磨痕上检测到轻微的表面损伤。在 MFR 中,磨痕的形态在中心棒区和周围的环形滑移区显示出清晰的细分。疲劳裂纹在粘滞区和滑移区之间的边界处开始并扩展。损伤机制是微动疲劳和微动磨损的结合,结合了粘附、表面疲劳和轻微的摩擦化学反应。在 GSR 中,微动磨损占主导地位。磨损机制主要是磨损、表面疲劳和以氧化为主的严重摩擦化学反应。
更新日期:2020-12-01
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