Paper 10: Metallurgical Aspects of Rolling Contact Fatigue:
Paper 10: Metallurgical Aspects of Rolling Contact Fatigue:
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论文 10：滚动接触疲劳的冶金方面：
DOI：
10.1243/pime_conf_1966_181_303_02
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发表时间：
1966
影响因子：
0.8
通讯作者：
G. H. Mills
中科院分区：
文献类型：
--
作者：
D. Scott;B. Loy;G. H. Mills
在电子显微镜和相关技术的辅助下，对失效的测试样本和使用中的轴承进行了冶金研究，以获得用于阐明失效机制的信息。调查显示，引发滚动接触疲劳的裂纹可以从表面开始并扩散到材料中，或者从表面下方开始并向外扩散，这是更主要的机制，具体取决于当时的情况。由于滚动和滑动作用而导致的表面材料的金相变化以及与最大赫兹剪切应力区域相关的深度处的地下微观结构变化可以影响失效机制。环境会影响裂纹扩展速率和断裂模式；氢脆可能是灾难性断裂的一个促成因素，而非金属夹杂物可能对失效发生率产生主导影响。
Metallurgical investigations aided by electron microscopy and associated techniques have been carried out on failed test specimens and bearings from service, to obtain information of use in the elucidation of the mechanisms of failure. Investigations have revealed that cracks initiating rolling contact fatigue can start at the surface and spread into the material, or start below the surface and spread outwards, the more dominant mechanism depending upon prevailing circumstances. Metallographic changes in surface material owing to rolling and sliding action, and subsurface microstructural changes at depths associated with the region of maximum Hertzian shearing stress can influence the mechanism of failure. Environment can affect the rate of crack propagation and mode of fracture; hydrogen embrittlement can be a contributory factor in catastrophic fracture, and non-metallic inclusions can have a dominant effect on the incidence of failure.