Very high cycle fatigue properties of bearing steel with different aluminum and sulfur content

doi:10.1016/j.ijfatigue.2018.06.047

CORC > 金属研究所 > 中国科学院金属研究所

	Very high cycle fatigue properties of bearing steel with different aluminum and sulfur content
	Yang, Chaoyun ; Luan, Yikun 1; Li, Dianzhong ; Li, Yiyi
刊名	INTERNATIONAL JOURNAL OF FATIGUE
	2018-11-01
卷号	116 页码:396-408
关键词	Very high cycle fatigue Bearing steel Aluminum content Sulfur content Crack initiation and propagation
ISSN号	0142-1123
DOI	10.1016/j.ijfatigue.2018.06.047
通讯作者	Luan, Yikun(ykluan@imr.ac.cn)
英文摘要	This study aims to clarify the effects of aluminum and sulfur content on fatigue property together with corresponding crack initiation and propagation behavior of bearing steel in the very high cycle fatigue (VHCF) regime. For these purposes, ultrasonic tensile-compression fatigue tests were carried out on fatigue specimens with different directions extracted from bearing steel bars containing different aluminum and sulfur content. As a result, high aluminum content in bearing steel leads to worse fatigue property by forming a large collection area of Al2O3 particles. MnS inclusions can cause fatigue failure of low sulfur bearing steel at the 45-degree angle and contribute to fatigue anisotropy. However, there are no MnS inclusions to be found at crack initiation region of failed specimens with ultralow sulfur content. For the VHCF fracture of bearing steel, fracture surface can be simply divided into four different areas according to crack propagation path except fatigue source. The stress intensity factor at the periphery of fine granular area (FGA) Delta K-FGA can be regarded as the critical driving force for crack propagating through martensite laths. In addition, crack initiation and propagation are the result of mutual coordination and matching of the driving force Delta K, crack propagation speed and microstructure. Dislocations and precipitated carbides play an important role in the formation of FGA by helping form the corresponding nanoscale grain boundary.
资助项目	National Natural Science Foundation of China[U1708252]
WOS研究方向	Engineering ; Materials Science
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000450377100038
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/130291]
专题	金属研究所_中国科学院金属研究所
通讯作者	Luan, Yikun
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Yang, Chaoyun,Luan, Yikun,Li, Dianzhong,et al. Very high cycle fatigue properties of bearing steel with different aluminum and sulfur content[J]. INTERNATIONAL JOURNAL OF FATIGUE,2018,116:396-408.
APA	Yang, Chaoyun,Luan, Yikun,Li, Dianzhong,&Li, Yiyi.(2018).Very high cycle fatigue properties of bearing steel with different aluminum and sulfur content.INTERNATIONAL JOURNAL OF FATIGUE,116,396-408.
MLA	Yang, Chaoyun,et al."Very high cycle fatigue properties of bearing steel with different aluminum and sulfur content".INTERNATIONAL JOURNAL OF FATIGUE 116(2018):396-408.