Crack initiation mechanisms of micro-textured Ti60 alloys with different dwell sensitivities subjected to fatigue and dwell fatigue loading

doi:10.1016/j.ijplas.2024.103986

IMR OpenIR

	Crack initiation mechanisms of micro-textured Ti60 alloys with different dwell sensitivities subjected to fatigue and dwell fatigue loading
	Wang, Boning 1,4,5; Zeng, Weidong 1,4,5; Zhao, Zibo 2,3; Jia, Runchen 1,4,5; Xu, Jianwei 1,4,5; Wang, Qingjiang 2,3
通讯作者	Zeng, Weidong(zengwd@nwpu.edu.cn) ; Zhao, Zibo(zbzhao@imr.ac.cn)
	2024-06-01
发表期刊	INTERNATIONAL JOURNAL OF PLASTICITY
ISSN	0749-6419
卷号	177 页码:21
摘要	In this work, Ti60 alloys with different micro -texture intensity were designed to elucidate the effect of micro -texture on fatigue life and dwell sensitivity and the difference in crack initiation mechanism for low -cycle fatigue (LCF) and dwell fatigue (DF). It was found that micro -texture region (MTR) significantly reduced LCF and DF lifetimes and increased dwell sensitivity compared to no-MTR samples. However, micro -texture does not change the characteristics of the crack initiation grains, and the fracture initiation region facet of all samples matches the (0001) basal plane and is related to basal slip. Therefore, the [0001] orientation domains for crack initiation in both fatigue states are discussed, and it is found that LCF tends to nucleate along the basal slip bands or basal twist grain boundaries (BTGBs) of the high SF grains, whereas DF nucleation is independent of the basal SF value, and the mechanism of initiation of hard oriented grain cracking is also included. In situ further demonstrated that hard grains can activate basal slip as well as cracking, and the possibility of soft/hard grain pairs generating dislocation pile-up stresses leading to cracking of hard grains was determined by theoretical calculations, providing experimental support and evidence for the soft/hard grain model. Based on these findings, criteria for the angle ( theta ) of the c -axis with respect to the loading axis and the basal SF range are proposed to determine the differences between LCF and DF with respect to the mechanisms of hard grain cracking and BTGB crack initiation.
关键词	Titanium alloy Micro-texture region Dwell-fatigue sensitivity Crack initiation mechanism Facet
资助者	National Major Science and Technology Project ; Construction of Scientists + Engineers Team in Qinchuangyuan, Shaanxi Province ; Youth Innovation Promotion Association CAS ; National Natural Science Foundation of China
DOI	10.1016/j.ijplas.2024.103986
收录类别	SCI
语种	英语
资助项目	National Major Science and Technology Project[J2019 -VI -0005-0119] ; Construction of Scientists + Engineers Team in Qinchuangyuan, Shaanxi Province[2022KXJ-079] ; Youth Innovation Promotion Association CAS[2020193] ; National Natural Science Foundation of China[51905436]
WOS研究方向	Engineering ; Materials Science ; Mechanics
WOS类目	Engineering, Mechanical ; Materials Science, Multidisciplinary ; Mechanics
WOS记录号	WOS:001238093300001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/186926
专题	中国科学院金属研究所
通讯作者	Zeng, Weidong; Zhao, Zibo
作者单位	1.Northwestern Polytech Univ, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, Xian 710072, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shi chang xu Innovat Ctr Adv Mat, 72 Wenhua Rd, Shenyang 110016, Peoples R China 4.Northwestern Polytech Univ, Def Technol Innovat Ctr precis forging & ring roll, Sch Mat Sci & Engn, Xian 710072, Peoples R China 5.Northwestern Polytech Univ, Shaanxi Key Lab High Performance Precis Forming Te, Xian 710072, Peoples R China
推荐引用方式 GB/T 7714	Wang, Boning,Zeng, Weidong,Zhao, Zibo,et al. Crack initiation mechanisms of micro-textured Ti60 alloys with different dwell sensitivities subjected to fatigue and dwell fatigue loading[J]. INTERNATIONAL JOURNAL OF PLASTICITY,2024,177:21.
APA	Wang, Boning,Zeng, Weidong,Zhao, Zibo,Jia, Runchen,Xu, Jianwei,&Wang, Qingjiang.(2024).Crack initiation mechanisms of micro-textured Ti60 alloys with different dwell sensitivities subjected to fatigue and dwell fatigue loading.INTERNATIONAL JOURNAL OF PLASTICITY,177,21.
MLA	Wang, Boning,et al."Crack initiation mechanisms of micro-textured Ti60 alloys with different dwell sensitivities subjected to fatigue and dwell fatigue loading".INTERNATIONAL JOURNAL OF PLASTICITY 177(2024):21.