Wear induced changes in surface topography during running-in of rolling-sliding contacts
Wear induced changes in surface topography during running-in of rolling-sliding contacts
复制标题
滚动滑动接触磨合过程中磨损引起的表面形貌变化
DOI：
10.1016/j.wear.2023.204685
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发表时间：
2023
期刊：
影响因子：
5
通讯作者：
Sakhamuri M
中科院分区：
文献类型：
--
作者：
Sakhamuri M
磨合发生在混合摩擦条件下的滚动-滑动接触中，通常涉及通过轻度磨损和塑性变形使粗糙平滑。为了改善混合摩擦条件下滚动轴承的使用寿命或摩擦的预测，了解磨合过程中的表面形貌变化及其对操作条件的依赖性是一个重要的先决条件。因此，本研究的目的是描述的表面机制，由于磨损，在跑合和它们的依赖变量之一，slipp.AISI 52100钢试样进行了测试，在一个小型牵引机（MTM）的摩擦和接触电位测量的存在下，PAO基础油，在混合润滑制度。采用三维光学轮廓术和扫描电子显微镜（SEM）实现了一种新的测试前和测试后表面重新定位方法。通过滚滑试验研究了滑滚比对磨合过程中表面形貌变化的影响。在此期间，进行了额外的测试来跟踪表面形貌的变化。结果显示了磨合的快速性以及大多数表面形貌的变化是如何在最初的几个负载循环中发生的。表面形貌的过渡，如凹凸不平的去除由于磨损，增加在凹凸不平的承载面积和在测试与滑动，塑性流动的材料从峰到相邻的谷显示在高放大率。表面轮廓测量结果表明，由于塑性流动的谷深度的减少增加了粗糙度的减少，从而准确地识别表面机制，并纠正的共识，即在跑合过程中粗糙度的减少主要是由于磨损和塑性变形减少了峰的高度，这是真正的理想跑合。
Running-in occurs in rolling-sliding contacts under mixed-friction conditions and typically involves asperity smoothing through mild wear and plastic deformation. To improve the prediction of service life or friction of rolling-element bearings under mixed-friction conditions, knowledge of surface topography changes during running-in and their dependence on the operating condition is an important prerequisite. Therefore, this study aims to describe the surface mechanisms due to wear, during running-in and their dependence on one of the variables, slip.AISI 52100 steel specimens were tested in a mini traction machine (MTM) instrumented with friction and contact potential measurement in the presence of a PAO base oil, operating in the mixed lubrication regime. A novel method of pre and post-test surface relocation with 3-D optical profilometry and scanning electron microscopy (SEM) was implemented. Rolling-sliding tests were performed to study the effect of slide-roll ratio on the surface topography changes during running-in. Additional tests were conducted to track the changes to surface topography during this period.The results exhibit the rapid nature of running-in and how most of the surface topography changes occur in the first few load cycles. Surface topography transitions such as asperity removal due to wear, increase in the load-bearing area of the asperities and in tests with slip, plastic flow of material from peaks into adjacent valleys are shown at high magnification. Surface profilometry measurements show that the reduction in depth of the valleys due to plastic flow adds to the reduction in roughness, thus accurately identifying the surface mechanism, and redressing the consensus that the reduction in roughness during running-in is mainly due to wear and plastic deformation diminishing the height of the peaks, which is true for ideal running-in alone.
滑移率对与油膜温度分布相关的弹流润滑膜影响的实验研究
DOI：
--
发表时间：
2006
期刊：
影响因子：
--
作者：
K. Yagi;K. Kyogoku;T. Nakahara
通讯作者：
T. Nakahara
DOI：
--
发表时间：
2007
期刊：
影响因子：
--
作者：
J. Jamari
通讯作者：
J. Jamari
滑动-滚动比对与齿轮应用相关的滚动-滑动接触中微点蚀损伤程度的影响
DOI：
--
发表时间：
2019
期刊：
Tribology letter
影响因子：
--
作者：
P. Rycerz;A. Kadiric
通讯作者：
A. Kadiric