A unified theory for microstructural alterations in bearing steels under rolling contact fatigue
A unified theory for microstructural alterations in bearing steels under rolling contact fatigue
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DOI：
10.1016/j.actamat.2018.05.056
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发表时间：
2018-08-15
期刊：
影响因子：
9.4
通讯作者：
Rivera-Diaz-del-Castillo, Pedro E. J.
中科院分区：
文献类型：
--
作者：
Fu, Hanwei;Rivera-Diaz-del-Castillo, Pedro E. J.
三种主要类型的微观结构变化下发生的滚动接触疲劳，白色蚀刻区（WEAs），暗蚀刻区（DER）和白色蚀刻带（WEBs），下一个统一的方法：位错辅助碳迁移理论建模。根据我们以前的工作DERs和WEBs，提出了一种新的模型来描述位错胞形成WEAs。该模型产生的预测WEAs的外观，同意与实验观察。轴承寿命可以通过WEA表观模型进行估算。将三种微构造蚀变模型结合起来，首次实现了用统一的理论预测WEA、DER和WEBs的发生和形成过程。显微结构蚀变图绘制为循环次数，温度，接触压力和应力循环频率的函数。该模型是由过去50年来报道的实验结果进行验证。(C)2018 Acta Materialia Inc.由Elsevier Ltd.发布。这是CC BY许可下的开放获取文章。
Three major types of microstructural alterations occurring under rolling contact fatigue, white etching areas (WEAs), dark etching regions (DERs) and white etching bands (WEBs), are modelled under a unified approach: dislocation-assisted carbon migration theory. Following our previous work on DERs and WEBs, a novel model is proposed to describe dislocation cell formation in WEAs. The proposed model yields predictions of WEAs appearance, agreeing with experimental observations. Bearing life can be estimated by the WEA appearance model. The three microstructural alterations models are combined and, for the first time, it becomes possible to predict the occurrence and the formation progress of WEAs, DERs and WEBs with a unified theory. Microstructural alteration maps are plotted as a function of number of cycles, temperature, contact pressure and stress cycle frequency. The models are validated by the experimental results reported over the last 50 years. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. This is an open access article under the CC BY license.