Heterogeneous precipitate microstructure in titanium alloys for simultaneous improvement of strength and ductility

doi:10.1016/j.jmst.2022.02.025

CORC > 金属研究所 > 中国科学院金属研究所

	Heterogeneous precipitate microstructure in titanium alloys for simultaneous improvement of strength and ductility
	Hao, Mengyuan 3; Li, Pei 1,3; Li, Xuexiong 4; Zhang, Tianlong 3; Wang, Dong 3; Sun, Qiaoyan 3; Liu, Libin 5; Li, Jinshan 2; Cui, Yuyou 4; Yang, Rui 4
刊名	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
	2022-10-10
卷号	124 页码:150-163
关键词	Titanium alloys Phase field simulation Crystal plasticity finite element Two-step aging Pseudospinodal decomposition mechanisms Multiscale heterogeneous microstructure
ISSN号	1005-0302
DOI	10.1016/j.jmst.2022.02.025
通讯作者	Sun, Qiaoyan(qysun@mail.xjtu.edu.cn) ; Xu, Dongsheng(dsxu@imr.ac.cn)
英文摘要	The design of alloys with simultaneous high strength and high ductility is still a difficult challenge. Here, we propose a new approach to designing multi-phase alloys with a synergistic combination of strength and ductility by engineering heterogeneous precipitate microstructures through the activation of different transformation mechanisms. Using a two-phase titanium alloy as an example, phase field simulations are carried out firstly to design heat treatment schedules that involve both conventional nucleation and growth and non-conventional pseudospinodal decomposition mechanisms, and the calculated microstructures have been evaluated by crystal plasticity finite element modeling. According to simulations, we then set a two-step heat treatment to produce bimodal alpha+ beta microstructure in Ti-10V-2Fe-3Al. Further mechanical testing shows that the ductility of the alloy is increased by -50% and the strength is increased by -10% as compared to its unimodal counterpart. Our work may provide a general way to improve the mechanical properties of alloys through multiscale microstructure design. (c) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
资助项目	National Key Research and Development Program of China[2016YFB0701302] ; National Natural Science Foundation of China[52171012] ; National Natural Science Foundation of China[51931004] ; City University of Hong Kong[7004894] ; City University of Hong Kong[9380060]
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:000788165000007
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China ; City University of Hong Kong
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/172641]
专题	金属研究所_中国科学院金属研究所
通讯作者	Sun, Qiaoyan; Xu, Dongsheng
作者单位	1.Thermal Power Res Inst Co Ltd, Xian 710032, Peoples R China 2.Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China 3.Xi An Jiao Tong Univ, Frontier Inst Sci & Technol, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China 4.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 5.Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China
推荐引用方式 GB/T 7714	Hao, Mengyuan,Li, Pei,Li, Xuexiong,et al. Heterogeneous precipitate microstructure in titanium alloys for simultaneous improvement of strength and ductility[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2022,124:150-163.
APA	Hao, Mengyuan.,Li, Pei.,Li, Xuexiong.,Zhang, Tianlong.,Wang, Dong.,...&Xu, Dongsheng.(2022).Heterogeneous precipitate microstructure in titanium alloys for simultaneous improvement of strength and ductility.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,124,150-163.
MLA	Hao, Mengyuan,et al."Heterogeneous precipitate microstructure in titanium alloys for simultaneous improvement of strength and ductility".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 124(2022):150-163.