Nanograin formation and cracking mechanism in Ti alloys under very high cycle fatigue loading

doi:10.1016/j.ijfatigue.2022.107331

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

	Nanograin formation and cracking mechanism in Ti alloys under very high cycle fatigue loading
	Sun, Chengqi 3,4; Wu, Han 3,4; Chi, Weiqian 2,4; Wang, Wenjing 2; Zhang, Guang-Ping 1
刊名	INTERNATIONAL JOURNAL OF FATIGUE
	2023-02-01
卷号	167 页码:10
关键词	Titanium alloy Very high cycle fatigue Twinning Nanograins Cracking mechanism
ISSN号	0142-1123
DOI	10.1016/j.ijfatigue.2022.107331
通讯作者	Sun, Chengqi(scq@lnm.imech.ac.cn) ; Zhang, Guang-Ping(gpzhang@imr.ac.cn)
英文摘要	This paper shows that nanograins appear in a locally high-stress region for very high cycle fatigue of TC17 alloy, and twinning is a main contributor to nanograin formation. The locally high stress results in twinning or slip in preferentially oriented alpha grains. Then, the interaction between twin systems or dislocations induces the forma-tion of dislocation cells or walls, nucleation of microbands, and finally the nanograins. As a result, the nanograin regions and the boundaries between the nanograin and coarse grain regions become preferential sites for crack initiation and early growth. The finite element analysis demonstrates the nanograin-related fatigue cracking behavior.
资助项目	National Natural Science Foundation of China Basic Science Center for Multiscale Problems in Nonlinear Mechanics[11988102] ; National Natural Science Foundation of China[91860112]
WOS关键词	INITIATION MECHANISMS ; ULTRAFINE-GRAIN ; TITANIUM ; EVOLUTION ; SURFACE ; MICROSTRUCTURE ; BEHAVIOR ; KINKING ; REGIME ; GROWTH
WOS研究方向	Engineering ; Materials Science
语种	英语
WOS记录号	WOS:000892574700002
资助机构	National Natural Science Foundation of China Basic Science Center for Multiscale Problems in Nonlinear Mechanics ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/91216]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	Sun, Chengqi; Zhang, Guang-Ping
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Beijing Jiaotong Univ, Key Lab Vehicle Adv Mfg Measuring & Control Techno, Minist Educ, Beijing 100044, Peoples R China 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, 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	Sun, Chengqi,Wu, Han,Chi, Weiqian,et al. Nanograin formation and cracking mechanism in Ti alloys under very high cycle fatigue loading[J]. INTERNATIONAL JOURNAL OF FATIGUE,2023,167:10.
APA	Sun, Chengqi,Wu, Han,Chi, Weiqian,Wang, Wenjing,&Zhang, Guang-Ping.(2023).Nanograin formation and cracking mechanism in Ti alloys under very high cycle fatigue loading.INTERNATIONAL JOURNAL OF FATIGUE,167,10.
MLA	Sun, Chengqi,et al."Nanograin formation and cracking mechanism in Ti alloys under very high cycle fatigue loading".INTERNATIONAL JOURNAL OF FATIGUE 167(2023):10.