Fatigue crack tip plastic zone of alpha plus beta titanium alloy with Widmanstatten microstructure

doi:10.1016/j.jmst.2018.03.012

CORC > 金属研究所 > 中国科学院金属研究所

	Fatigue crack tip plastic zone of alpha plus beta titanium alloy with Widmanstatten microstructure
	Ma, Yingjie 2,3; Youssef, Sabry S.2,3; Feng, Xin 2; Wang, Hao 2,3; Huang, Sensen 1,2; Qiu, Jianke 2; Lei, Jiafeng 2,3; Yang, Rui 2,3
刊名	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
	2018-11-01
卷号	34 期号:11 页码:2107-2115
关键词	Titanium alloy Widmanstatten microstructure CTPZ Slip Deformation twinning
ISSN号	1005-0302
DOI	10.1016/j.jmst.2018.03.012
通讯作者	Lei, Jiafeng(jflei@imr.ac.cn) ; Yang, Rui(ryang@imr.ac.cn)
英文摘要	The 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.
资助项目	National Natural Science Foundation of China[51401221] ; National Natural Science Foundation of China[51671195] ; Youth Innovation Promotion Association CAS
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	JOURNAL MATER SCI TECHNOL
WOS记录号	WOS:000439396700015
资助机构	National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/135864]
专题	金属研究所_中国科学院金属研究所
通讯作者	Lei, Jiafeng; Yang, Rui
作者单位	1.Northeastern Univ, Shenyang 110089, Liaoning, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 3.Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China
推荐引用方式 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.