Effects of natural aging and variable loading on very high cycle fatigue behavior of a bearing steel GCr15

doi:10.1016/j.tafmec.2022.103360

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Effects of natural aging and variable loading on very high cycle fatigue behavior of a bearing steel GCr15
	Li, Gen 4; Ke, Lei 3; Peng, Wenjie 2; Ren, Xuechong 3; Sun, Chengqi 1,4
刊名	THEORETICAL AND APPLIED FRACTURE MECHANICS
	2022-06-01
卷号	119 页码:10
关键词	GCr15 High strength steel Natural aging Variable amplitude loading Very high cycle fatigue Crack initiation
ISSN号	0167-8442
DOI	10.1016/j.tafmec.2022.103360
通讯作者	Ren, Xuechong(Xcren@ustb.edu.cn) ; Sun, Chengqi(scq@lnm.imech.ac.cn)
英文摘要	Natural aging and variable amplitude loading are very common for structural parts subjected to fatigue loading. In this paper, ultrasonic frequency fatigue tests without intermittence were conducted to investigate the effects of natural aging and variable amplitude loading on very high cycle fatigue (VHCF) behavior of a high strength steel GCr15. It was shown that a natural aging of 10000 h prolonged the fatigue life of GCr15 steel in VHCF regime. The reason was that more granular carbides precipitated in the microstructure after the natural aging, and they strengthened the fatigue resistance of the material. The natural aging had no influence on the characteristics of the crack initiation and early growth region of GCr15 steel in VHCF regime. The effect of low loading in variable amplitude on fatigue life was related to its loading sequence, loading cycles and stress level. Under step loadings, the low loading with a number of cycles could reduce the fatigue life. The high loading in variable amplitude with a small number of cycles accelerated the crack initiation and growth. It could also change the fatigue failure mechanism to the one dominated by high loading.
资助项目	National Natural Science of China Basic Science Center for Multiscale Problems in Nonlinear Mechanics[11988102] ; fund of International Postdoctoral Exchange Fellowship Program (China)
WOS关键词	SUBSURFACE CRACK INITIATION ; HIGH-STRENGTH STEEL ; GROWTH ; LIFE
WOS研究方向	Engineering ; Mechanics
语种	英语
WOS记录号	WOS:000796004400002
资助机构	National Natural Science of China Basic Science Center for Multiscale Problems in Nonlinear Mechanics ; fund of International Postdoctoral Exchange Fellowship Program (China)
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/89432]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	Ren, Xuechong; Sun, Chengqi
作者单位	1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Baosteel Cent Res Inst, Wuhan 430080, Peoples R China 3.Univ Sci & Technol Beijing, Natl Ctr Mat Serv Safety, Beijing 100083, Peoples R China 4.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Li, Gen,Ke, Lei,Peng, Wenjie,et al. Effects of natural aging and variable loading on very high cycle fatigue behavior of a bearing steel GCr15[J]. THEORETICAL AND APPLIED FRACTURE MECHANICS,2022,119:10.
APA	Li, Gen,Ke, Lei,Peng, Wenjie,Ren, Xuechong,&Sun, Chengqi.(2022).Effects of natural aging and variable loading on very high cycle fatigue behavior of a bearing steel GCr15.THEORETICAL AND APPLIED FRACTURE MECHANICS,119,10.
MLA	Li, Gen,et al."Effects of natural aging and variable loading on very high cycle fatigue behavior of a bearing steel GCr15".THEORETICAL AND APPLIED FRACTURE MECHANICS 119(2022):10.