Formation of a Needle-Like Structure when Surface Flaking Occurs During the Rolling Contact Fatigue of a GCr15 Bearing

doi:10.11900/0412.1961.2023.00005

IMR OpenIR

	Formation of a Needle-Like Structure when Surface Flaking Occurs During the Rolling Contact Fatigue of a GCr15 Bearing
	Cheng Sheng 1,2; Sun Yang 1,3; Zhao Wenhui 3; Luan Yikun 1,2; Zheng Chengwu 1,2; Li Dianzhong 1
通讯作者	Zheng Chengwu(cwzheng@imr.ac) ; Li Dianzhong(dzli@imr.ac.cn)
	2024-04-11
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	60 期号:4 页码:425-433
摘要	As a form of damage caused by rolling contact, rolling contact fatigue (RCF) can lead to early pitting and flaking on the raceway surface of bearings, which is frequently accompanied by the propagation and fracture of RCF cracks. When the RCF crack is initiated on the raceway surface, large amount of stress, e. g., fluid pressurization, may be exerted close to the crack faces, which can not only accelerate the crack growth and cause rapid failure of the bearing but also lead to local microstructural alternations in the bearing steel. In this study, a needle-like structure was observed close to the cracks with flaking occurring during RCF in a GCr15 rolling bearing. The microstructures of the needle-like structure were analyzed via SEM, transmission Kikuchi diffraction (TKD), and TEM to elucidate its microstructural constitutions and characteristics. Results illustrated that the needle-like structure is a thin plate in three dimension decorated with some microvoids and equiaxed ferrite nanocrystalline formed at the interfaces. The formation of the needle-like structure was attributed to the local stress exerted close to the crack surface during the RCF of the bearings. This structure may be a type of decayed microstructure of the martensitic matrix of the bearing steel. With the increasing RCF stress cycles, the microvoids in the needle-like structure may facilitate the initiation and propagation of surface cracks preferentially, thus accelerating the occurrence of surface fatigue flaking in the bearing.
关键词	GCr15 bearing steel rolling contact fatigue surface crack needle-like structure
资助者	National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences
DOI	10.11900/0412.1961.2023.00005
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52031013] ; Strategic Priority Research Program of Chinese Academy of Sciences
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001208569500002
出版者	SCIENCE PRESS
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/185815
专题	中国科学院金属研究所
通讯作者	Zheng Chengwu; Li Dianzhong
作者单位	1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Shenyang Univ Technol, Sch Mech Engn, Shenyang 110870, Peoples R China
推荐引用方式 GB/T 7714	Cheng Sheng,Sun Yang,Zhao Wenhui,et al. Formation of a Needle-Like Structure when Surface Flaking Occurs During the Rolling Contact Fatigue of a GCr15 Bearing[J]. ACTA METALLURGICA SINICA,2024,60(4):425-433.
APA	Cheng Sheng,Sun Yang,Zhao Wenhui,Luan Yikun,Zheng Chengwu,&Li Dianzhong.(2024).Formation of a Needle-Like Structure when Surface Flaking Occurs During the Rolling Contact Fatigue of a GCr15 Bearing.ACTA METALLURGICA SINICA,60(4),425-433.
MLA	Cheng Sheng,et al."Formation of a Needle-Like Structure when Surface Flaking Occurs During the Rolling Contact Fatigue of a GCr15 Bearing".ACTA METALLURGICA SINICA 60.4(2024):425-433.