Interior initiation and early growth of very high cycle fatigue crack in an additively manufactured Ti-alloy

doi:10.1016/j.ijfatigue.2022.106862

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

	Interior initiation and early growth of very high cycle fatigue crack in an additively manufactured Ti-alloy
	Chi, Weiqian 2,3; Li, Gen 2; Wang, Wenjing 3; Sun, Chengqi 1,2
刊名	INTERNATIONAL JOURNAL OF FATIGUE
	2022-07-01
卷号	160 页码:9
关键词	Additively manufactured titanium alloy Very high cycle fatigue Interior crack initiation Ultralow crack growth rate Grain refinement
ISSN号	0142-1123
DOI	10.1016/j.ijfatigue.2022.106862
通讯作者	Wang, Wenjing(wjwang@bjtu.edu.cn) ; Sun, Chengqi(scq@lnm.imech.ac.cn)
英文摘要	Very high cycle fatigue of an additively manufactured Ti-6Al-4V is studied at R =-1, 0.1 and 0.2. The fracture surface of crack initiation and early growth region presents fine granular area (FGA) morphology with discon-tinuous regions of nanograins. The equivalent crack growth rate in FGA is in the magnitude of 10(-13)-10(-11) m/cyc based on the "tree ring" patterns marked on fracture surface. Interior crack initiation and early growth is attributed to the cracks caused by nanograins formed during fatigue loading and the cracks formed irrespective of nanograins. The crack growth rate in FGA is also used to predict the fatigue life.
资助项目	National Natural Science Foundation of China Basic Science Center for Multiscale Problems in Nonlinear Mechanics[11988102] ; Science and Technology Research and Development Program of China State Railway Group Co., Ltd.[P2020J024] ; National Natural Science Foundation of China[91860112]
WOS关键词	HIGH-STRENGTH STEELS ; E D FUSION ; LIFE ; BEHAVIOR ; MECHANISM ; TI-6AL-4V ; MICROSTRUCTURE ; PROPAGATION ; PERFORMANCE ; THRESHOLD
WOS研究方向	Engineering ; Materials Science
语种	英语
WOS记录号	WOS:000793136300001
资助机构	National Natural Science Foundation of China Basic Science Center for Multiscale Problems in Nonlinear Mechanics ; Science and Technology Research and Development Program of China State Railway Group Co., Ltd. ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/89447]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	Wang, Wenjing; Sun, Chengqi
作者单位	1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China 3.Beijing Jiaotong Univ, Key Lab Vehicle Adv Mfg Measuring & Control Techn, Minist Educ, Beijing 100044, Peoples R China
推荐引用方式 GB/T 7714	Chi, Weiqian,Li, Gen,Wang, Wenjing,et al. Interior initiation and early growth of very high cycle fatigue crack in an additively manufactured Ti-alloy[J]. INTERNATIONAL JOURNAL OF FATIGUE,2022,160:9.
APA	Chi, Weiqian,Li, Gen,Wang, Wenjing,&Sun, Chengqi.(2022).Interior initiation and early growth of very high cycle fatigue crack in an additively manufactured Ti-alloy.INTERNATIONAL JOURNAL OF FATIGUE,160,9.
MLA	Chi, Weiqian,et al."Interior initiation and early growth of very high cycle fatigue crack in an additively manufactured Ti-alloy".INTERNATIONAL JOURNAL OF FATIGUE 160(2022):9.