Precipitation behavior of alpha(2) phase and its influence on mechanical properties of binary Ti-8Al alloy

doi:10.1016/j.jallcom.2021.159577

IMR OpenIR

	Precipitation behavior of alpha(2) phase and its influence on mechanical properties of binary Ti-8Al alloy
	Youssef, Sabry S.1,2; Zheng, Xiaodong 1,2; Huang, Sensen 2,3; Ma, Yingjie 1,2,3; Qi, Min 1,2; Zheng, Shijian 4; Lei, Jiafeng 1,2,3; Yang, Rui 1,2,3
通讯作者	Ma, Yingjie(yjma@imr.ac.cn) ; Yang, Rui(ryang@imr.ac.cn)
	2021-08-05
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	871 页码:17
摘要	The precipitation behavior of Ti3Al (alpha(2)) and its effect on the tensile properties and fracture toughness of the binary Ti-8Al alloy were investigated. Ti-8Al alloy was firstly solution-treated to obtain Widmanstatten structure and then aged for different aging times to promote alpha(2) precipitation. Transmission electron microscopy and atom probe tomography analyses were employed to characterize the presence of alpha(2) phase. The results showed that the size and volume fraction of alpha(2) precipitates increased as aging time prolonged. The relationship between the mechanical properties and alpha(2) precipitates was evaluated. The increase in the volume fraction of alpha(2) enhanced the alloy strength, meanwhile, induced the long-rang planar slipping and inhibited the twinning activity. This could intensify strain localization and decrease fatigue crack tip plastic zone size (CTPZ), leading to the reduction of ductility and fracture toughness. The in-situ tensile test results revealed that the activation of slipping and colony rotations both occurred in response to deformation. Also, it was found that the increase of the plastic strain enhanced the intensity of strain localization, and the misorientation across the shearing band in the large alpha colony enhanced the stress concentration area which would promote the crack nucleation. In light of these findings, the tailoring of alpha(2) precipitation in titanium alloys are required in the design of high-performance alloys for structural applications. (C) 2021 Elsevier B.V. All rights reserved.
关键词	Ti-8Al alloy alpha(2) precipitates Tensile properties Fracture toughness
资助者	Strategic Priority Research Program of the Chinese Academy of Sciences ; National Key Research and Development Program of China ; Natural Science Foundation of China ; Youth Innovation Promotion Association CAS
DOI	10.1016/j.jallcom.2021.159577
收录类别	SCI
语种	英语
资助项目	Strategic Priority Research Program of the Chinese Academy of Sciences[XDA22010101] ; National Key Research and Development Program of China[2016YFC0304201] ; National Key Research and Development Program of China[2016YFC0304206] ; Natural Science Foundation of China[51871225] ; Youth Innovation Promotion Association CAS
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000647778600002
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：14[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/321006/161747
专题	中国科学院金属研究所
通讯作者	Ma, Yingjie; Yang, Rui
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Shichangxu Innovat Ctr Advanved Mat, Inst Met Res, Shenyang 110016, Peoples R China 3.Southern Marine Sci & Engn Guangdong Lab, Innovat Grp Marine Engn Mat & Corros Control, Zhuhai 519080, Peoples R China 4.Hebei Univ Technol, Sch Mat Sci & Engn, Res Inst Energy Equipment Mat, Tianjin 300130, Peoples R China
推荐引用方式 GB/T 7714	Youssef, Sabry S.,Zheng, Xiaodong,Huang, Sensen,et al. Precipitation behavior of alpha(2) phase and its influence on mechanical properties of binary Ti-8Al alloy[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2021,871:17.
APA	Youssef, Sabry S..,Zheng, Xiaodong.,Huang, Sensen.,Ma, Yingjie.,Qi, Min.,...&Yang, Rui.(2021).Precipitation behavior of alpha(2) phase and its influence on mechanical properties of binary Ti-8Al alloy.JOURNAL OF ALLOYS AND COMPOUNDS,871,17.
MLA	Youssef, Sabry S.,et al."Precipitation behavior of alpha(2) phase and its influence on mechanical properties of binary Ti-8Al alloy".JOURNAL OF ALLOYS AND COMPOUNDS 871(2021):17.