Crack initiation mechanisms under two stress ratios up to very-high-cycle fatigue regime for a selective laser melted Ti-6Al-4V

doi:10.1016/j.ijfatigue.2021.106294

IMECH-IR > 非线性力学国家重点实验室

	Crack initiation mechanisms under two stress ratios up to very-high-cycle fatigue regime for a selective laser melted Ti-6Al-4V
	Du LM(杜雷鸣)1,2; Pan XN(潘向南)1; Qian GA(钱桂安)1 ; Zheng L(郑亮)2; Hong YS(洪友士)1
通讯作者	Zheng, Liang(icon_lzheng@hit.edu.cn) ; Hong, Youshi(hongys@imech.ac.cn)
发表期刊	INTERNATIONAL JOURNAL OF FATIGUE
	2021-08-01
卷号	149 页码:10
ISSN	0142-1123
摘要	Crack initiation mechanisms under two stress ratios (R = - 1 and 0.5) and up to very-high-cycle fatigue (VHCF) regime of a selective laser melted (SLMed) Ti-6Al-4V were investigated. Type I lack-of-fusion defects (almost equiaxed) induced crack initiation except for the cases of VHCF under R = 0.5 in which type II defects (large aspect ratio) caused facet mode crack initiation. A nanograin layer formed underneath the crack initiation region of rough area for the cases of VHCF at R = - 1, which was explained by the numerous cyclic pressing (NCP) model. A P-S-N approach was introduced to well describe the fatigue life up to VHCF regime under R = - 1 and 0.5 for the SLMed titanium alloy.
关键词	Very-high-cycle fatigue Crack initiation mechanism Stress ratio Ti-6Al-4V Selective laser melting
DOI	10.1016/j.ijfatigue.2021.106294
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000655655900001
关键词[WOS]	ADDITIVELY MANUFACTURED TI-6AL-4V ; TITANIUM-ALLOY ; BEHAVIOR ; MICROSTRUCTURE ; STRENGTH ; TI6AL4V ; GROWTH ; LIFE
WOS研究方向	Engineering ; Materials Science
WOS类目	Engineering, Mechanical ; Materials Science, Multidisciplinary
资助项目	National Natural Science Foundation of China[11932020] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040503] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22020201]
项目资助者	National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences
论文分区	一类
力学所作者排名	1
RpAuthor	Zheng, Liang ; Hong, Youshi
引用统计	被引频次：33[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/86941
专题	非线性力学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China; 2.Harbin Inst Technol, Sch Sci, Shenzhen 518055, Peoples R China
推荐引用方式 GB/T 7714	Du LM,Pan XN,Qian GA,et al. Crack initiation mechanisms under two stress ratios up to very-high-cycle fatigue regime for a selective laser melted Ti-6Al-4V[J]. INTERNATIONAL JOURNAL OF FATIGUE,2021,149:10.
APA	杜雷鸣,潘向南,钱桂安,郑亮,&洪友士.(2021).Crack initiation mechanisms under two stress ratios up to very-high-cycle fatigue regime for a selective laser melted Ti-6Al-4V.INTERNATIONAL JOURNAL OF FATIGUE,149,10.
MLA	杜雷鸣,et al."Crack initiation mechanisms under two stress ratios up to very-high-cycle fatigue regime for a selective laser melted Ti-6Al-4V".INTERNATIONAL JOURNAL OF FATIGUE 149(2021):10.

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