ON WHITE ETCHING BAND FORMATION IN ROLLING BEARINGS
ON WHITE ETCHING BAND FORMATION IN ROLLING BEARINGS
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DOI：
10.1016/0022-5096(95)00001-y
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发表时间：
1995-04-01
影响因子：
5.3
通讯作者：
KEER, LM
中科院分区：
文献类型：
--
作者：
POLONSKY, IA;KEER, LM
针对滚动轴承接触疲劳时滚道表面出现白色腐蚀带的问题进行了研究。无论是显着的方向性的WEBs，也没有观察到的速度，他们的增长已经令人满意的解释。先前试图解释观察到的WEB取向进行批判性审查。提出了一种新的WEB形成的物理概念。有人建议，溶解的碳从WEBs，主要是由循环应力引起的碳分离的位错气氛的形式释放的扩散流出，在WEB形成中起着根本性的作用。基于这一概念，一个显着的改善WEB形成率的预测实现（与以前的分析相比）。建议的物理概念导致WEB方向的一个新的标准，包括最大化的偏正应力的变化幅度的跨WEB的作用，并考虑到在接触应力循环的交替应力极值的顺序。第二个实验观察到的家庭的WEBs的特点进行了讨论，并相应地修改了新的标准。新的WEB定向标准首次对观测到的WEB定向性的所有基本特征提供了一致的解释。
The problem of white etching band (WEB) formation in races of rolling bearings experiencing rolling contact fatigue is addressed in this paper. Neither the remarkable directionality of WEBs, nor the observed rate of their growth has been satisfactorily explained up to date. The previous attempts to explain the observed WEB orientation are critically reviewed. A new physical concept of WEB formation is introduced. It is suggested that diffusional outflow of dissolved carbon from WEBs, primarily caused by cyclic stress induced release of carbon segregated in the form of dislocation atmospheres, plays a fundamental role in WEB formation. Based on this concept, a dramatic improvement in the prediction of WEB formation rate is achieved (as compared to the previous analyses). The suggested physical concept leads to a new criterion of WEB orientation, involving maximization of the amplitude of variation of the deviatoric normal stress acting across the WEB, and taking into consideration the sequence of alternating stress extrema in a contact stress cycle. Peculiarities of the second of the two experimentally observed families of WEBs are discussed, and the new criterion is modified accordingly. The new WEB orientation criterion provides for the first time a consistent explanation of all basic features of the observed WEB directionality.