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
Corresponding AuthorZheng, Liang(icon_lzheng@hit.edu.cn) ; Hong, Youshi(hongys@imech.ac.cn)
Source PublicationINTERNATIONAL JOURNAL OF FATIGUE
2021-08-01
Volume149Pages:10
ISSN0142-1123
AbstractCrack 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.
KeywordVery-high-cycle fatigue Crack initiation mechanism Stress ratio Ti-6Al-4V Selective laser melting
DOI10.1016/j.ijfatigue.2021.106294
Indexed BySCI ; EI
Language英语
WOS IDWOS:000655655900001
WOS KeywordADDITIVELY MANUFACTURED TI-6AL-4V ; TITANIUM-ALLOY ; BEHAVIOR ; MICROSTRUCTURE ; STRENGTH ; TI6AL4V ; GROWTH ; LIFE
WOS Research AreaEngineering ; Materials Science
WOS SubjectEngineering, Mechanical ; Materials Science, Multidisciplinary
Funding ProjectNational 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]
Funding OrganizationNational Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences
Classification一类
Ranking1
ContributorZheng, Liang ; Hong, Youshi
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/86941
Collection非线性力学国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China;
2.Harbin Inst Technol, Sch Sci, Shenzhen 518055, Peoples R China
Recommended Citation
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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