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Fatigue crack tip plastic zone of alpha plus beta titanium alloy with Widmanstatten microstructure
Ma, Yingjie1,2; Youssef, Sabry S.1,2; Feng, Xin1; Wang, Hao1,2; Huang, Sensen1,3; Qiu, Jianke1; Lei, Jiafeng1,2; Yang, Rui1,2
Corresponding AuthorLei, Jiafeng(jflei@imr.ac.cn) ; Yang, Rui(ryang@imr.ac.cn)
2018-11-01
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume34Issue:11Pages:2107-2115
AbstractThe recent studies had focused on the fatigue crack propagation behaviors of alpha + beta titanium alloys with Widmanstatten micro structure. The fascinated interest of this type of microstructure is due to the superior fatigue crack propagation resistance and fracture toughness as compared to other microstructures, which was believed to be related to the fatigue crack tip plastic zone (CTPZ). In this study, the plastic deformation in fatigue CTPZ of Ti-6A1-4V titanium alloy with Widmanstatten microstructure was characterized by scanning electron microscope (SEM) and electron backscatter diffraction (EBSD). The results showed that large-scale slipping and deformation twinning were generated in fatigue CTPZ due to the crystallographic feature of the Widmanstatten microstructure. The activation of twinning was related to the rank of Schmid factor (SF) and the diversity of twin variants developing behaviors reflected the influence of SF rank. The sizes of CTPZ under different stress intensity factors (K) were examined by the white-light coherence method, and the results revealed that the range of the plastic zone is enlarged with the increasing K (or crack length), while the plastic strain decreased rapidly with the increasing distance from the crack surface. The large-scale slipping and deformation twinning in Widmannstatten microstructure remarkably expanded the range of fatigue CTPZ, which would lead to the obvious larger size of the observed CTPZ than that of the theoretically calculated size. (C) 2018 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
KeywordTitanium alloy Widmanstatten microstructure CTPZ Slip Deformation twinning
Funding OrganizationNational Natural Science Foundation of China ; Youth Innovation Promotion Association CAS
DOI10.1016/j.jmst.2018.03.012
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51401221] ; National Natural Science Foundation of China[51671195] ; Youth Innovation Promotion Association CAS
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000439396700015
PublisherJOURNAL MATER SCI TECHNOL
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/135867
Collection中国科学院金属研究所
Corresponding AuthorLei, Jiafeng; Yang, Rui
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
2.Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China
3.Northeastern Univ, Shenyang 110089, Liaoning, Peoples R China
Recommended Citation
GB/T 7714
Ma, Yingjie,Youssef, Sabry S.,Feng, Xin,et al. Fatigue crack tip plastic zone of alpha plus beta titanium alloy with Widmanstatten microstructure[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2018,34(11):2107-2115.
APA Ma, Yingjie.,Youssef, Sabry S..,Feng, Xin.,Wang, Hao.,Huang, Sensen.,...&Yang, Rui.(2018).Fatigue crack tip plastic zone of alpha plus beta titanium alloy with Widmanstatten microstructure.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,34(11),2107-2115.
MLA Ma, Yingjie,et al."Fatigue crack tip plastic zone of alpha plus beta titanium alloy with Widmanstatten microstructure".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 34.11(2018):2107-2115.
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