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	Ratcheting led surface failure of medium carbon bainitic steel under mild operation conditions
	Dou, P ; Li, YG ; Liang, KM ; Bai, BZ
	2010-05-10 ; 2010-05-10
关键词	rolling contact fatigue medium carbon bainitic steel ratcheting ratcheting crack elastic shakedown limit ROLLING-CONTACT FATIGUE HALF-SPACE WEAR MECHANICS CRACKS Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Mining & Mineral Processing
中文摘要	The behavior of rolling contact fatigue (RCF) of medium carbon bainitic back-up roll steel was investigated under its actual work conditions. A kind of asperity-scale surface originated cracks, which is lying parallel or at an acute angle to the surfaces, initiated after unidirectional plastic flow of the material in thin surface layer had occurred. Theoretical analysis indicates that they nucleate due to plastic ratcheting induced by asperity contact stresses, and consequently are named as ratcheting cracks. After nucleating and initially propagating, they arrest at some depth and resume propagating till about 70%-80% of the RCF failure life by initially turning parallel to contact surfaces. Their behavior of initiation and propagation is confined to a thin layer prior to the formation of surface distress. According to the critical principle of the preventive grinding strategy, removing the asperity influenced surface layer at about 70%-80% of the RCF failure life can effectively prevent the ratcheting cracks from developing into surface distress, which can lead to the formation of macro-RCF failure soon.
语种	英语 ; 英语
出版者	JOURNAL OF UNIV OF SCIENCE AND TECHNOLOGY BEIJING ; BEIJING ; 30 XUEYUANLU, BEIJING 100083, PEOPLES R CHINA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/20724]
专题	清华大学
推荐引用方式 GB/T 7714	Dou, P,Li, YG,Liang, KM,et al. Ratcheting led surface failure of medium carbon bainitic steel under mild operation conditions[J],2010, 2010.
APA	Dou, P,Li, YG,Liang, KM,&Bai, BZ.(2010).Ratcheting led surface failure of medium carbon bainitic steel under mild operation conditions..
MLA	Dou, P,et al."Ratcheting led surface failure of medium carbon bainitic steel under mild operation conditions".(2010).

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