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

文献类型：期刊论文

作者Youssef, Sabry S.2,3; Zheng, Xiaodong2,3; Huang, Sensen3,4; Ma, Yingjie2,3,4; Qi, Min2,3; Zheng, Shijian1; Lei, Jiafeng2,3,4; Yang, Rui2,3,4
刊名JOURNAL OF ALLOYS AND COMPOUNDS
出版日期2021-08-05
卷号871页码:17
ISSN号0925-8388
关键词Ti-8Al alloy alpha(2) precipitates Tensile properties Fracture toughness
DOI10.1016/j.jallcom.2021.159577
通讯作者Ma, Yingjie(yjma@imr.ac.cn) ; Yang, Rui(ryang@imr.ac.cn)
英文摘要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.
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
语种英语
出版者ELSEVIER SCIENCE SA
WOS记录号WOS:000647778600002
资助机构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
源URL[http://ir.imr.ac.cn/handle/321006/161746]  
专题金属研究所_中国科学院金属研究所
通讯作者Ma, Yingjie; Yang, Rui
作者单位1.Hebei Univ Technol, Sch Mat Sci & Engn, Res Inst Energy Equipment Mat, Tianjin 300130, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
3.Chinese Acad Sci, Shichangxu Innovat Ctr Advanved Mat, Inst Met Res, Shenyang 110016, Peoples R China
4.Southern Marine Sci & Engn Guangdong Lab, Innovat Grp Marine Engn Mat & Corros Control, Zhuhai 519080, 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.

入库方式： OAI收割

来源：金属研究所

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