Investigation of single asperity wear at the microscale in an austenitic steel
Investigation of single asperity wear at the microscale in an austenitic steel
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DOI：
10.1016/j.wear.2020.203289
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发表时间：
2020-07
期刊：
影响因子：
5
通讯作者：
Wenzhen Xia;G. Dehm;S. Brinckmann
中科院分区：
文献类型：
--
作者：
Wenzhen Xia;G. Dehm;S. Brinckmann
工程表面由微凸体组成，其在摩擦学系统的磨合期间产生塑性。一个基本的洞察力，在微观尺度上的单粗糙磨损过程中的塑性流动，需要彻底了解宏观尺度上的摩擦学诱导的微观结构，并定制未来的金属表面。本文研究了奥氏体不锈钢中的{001}-、{101}-和{111}-晶粒的磨损。从压痕到犁削的过渡和犁削过程中塑性的演变。我们发现，在磨损实验的压痕部分的滑移步骤和堆积的演变影响犁耕部分，随后在压痕的塑性。我们的结论是堆积的演变占主导地位的发展过程中的摩擦力犁在微观尺度上。
Engineering surfaces consist of microasperities, which result in plasticity during the run-in of the tribological system. A fundamental insight of the plastic flow during single asperity wear at the microscale is required to thoroughly understand tribology induced microstructure at the macroscale and to tailor future metal surfaces. In this work, we indent and wear {001}-, {101}- and {111}-grains in an austenite stainless steel. The transition from indentation to ploughing and the evolution of plasticity during ploughing is addressed. We find that slip-step and pile-up evolution during the indentation segment of the wear experiment influence the plasticity during the ploughing segment that follows upon the indentation. We conclude that the pile-up evolution dominates the development of the friction force during ploughing at the microscale.