Precipitation behavior and strengthening-toughening mechanism of hot rolled sheet of Ti65 titanium alloy during aging process

doi:10.1016/j.jallcom.2020.154786

CORC > 金属研究所 > 中国科学院金属研究所

	Precipitation behavior and strengthening-toughening mechanism of hot rolled sheet of Ti65 titanium alloy during aging process
	Zhang, Zhixin 1,2; Fan, Jiangkun 2,3; Wu, Zhihong 2; Zhao, Ding 2; Gao, Qi 1; Wang, Qinbo 1; Chen, Zhiyong 4; Tang, Bin 2,3; Kou, Hongchao 2,3; Li, Jinshan 2,3
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2020-08-05
卷号	831 页码:9
关键词	Titanium alloy Mechanical property Phase transformation Silicide Strengthening and toughening
ISSN号	0925-8388
DOI	10.1016/j.jallcom.2020.154786
通讯作者	Fan, Jiangkun(jkfan@nwpu.edu.cn) ; Li, Jinshan()
英文摘要	Although the addition of various alloying elements to the near a alloy improves the high temperature service performance, the plasticity is always unsatisfactory while the strength is increased. In the present work, the strength and ductility of the Ti65 alloy sheet are successfully improved simultaneously by optimizing the aging heat treatment process. The effect of aging heat treatment on microstructure, precipitation behavior and tensile property of Ti65 alloy sheet has been investigated by contrast tests of the sheets before and after aging. The results reveal that the ratio of equiaxed alpha(p) to lamellar alpha(s) varies, two kinds of (TiZr)(6)Si-3 silicide (globular and interfacial silicide) precipitate at different position and the interface transforms to be discontinuous during aging process. Besides, the strength and ductility of Ti65 alloy sheet are improved simultaneously during tensile tests after aging at 700 degrees C. The ultimate tensile strength and elongation strain gets 4.9% and 123.8% increase, respectively. The strengthening of the aged Ti65 alloy sheet is mainly attributed to the precipitation of the interfacial silicide (TiZr)(3)Si and Ti3Al. The significant improvement in ductility should benefit from the optimization of the ratios of the equiaxed alpha(p) and lamellar alpha(s), and the formation of discontinuous lamellae interface. (C) 2020 Elsevier B.V. All rights reserved.
资助项目	Major State Research Development Program of China[2016YFB0701305] ; National Natural Science Foundation of China[51801156] ; Natural Science Basic Research Plan in Shaanxi Province of China[2018JQ5035] ; Natural Science Basic Research Plan in Shaanxi Province of China[2019JM-584]
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:000531727400005
资助机构	Major State Research Development Program of China ; National Natural Science Foundation of China ; Natural Science Basic Research Plan in Shaanxi Province of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/138868]
专题	金属研究所_中国科学院金属研究所
通讯作者	Fan, Jiangkun; Li, Jinshan
作者单位	1.Baoti Grp Ltd, Baoji 721014, Shaanxi, Peoples R China 2.Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China 3.Natl & Local Joint Engn Res Ctr Precis Thermoform, Xian 710072, Shaanxi, Peoples R China 4.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Zhixin,Fan, Jiangkun,Wu, Zhihong,et al. Precipitation behavior and strengthening-toughening mechanism of hot rolled sheet of Ti65 titanium alloy during aging process[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2020,831:9.
APA	Zhang, Zhixin.,Fan, Jiangkun.,Wu, Zhihong.,Zhao, Ding.,Gao, Qi.,...&Li, Jinshan.(2020).Precipitation behavior and strengthening-toughening mechanism of hot rolled sheet of Ti65 titanium alloy during aging process.JOURNAL OF ALLOYS AND COMPOUNDS,831,9.
MLA	Zhang, Zhixin,et al."Precipitation behavior and strengthening-toughening mechanism of hot rolled sheet of Ti65 titanium alloy during aging process".JOURNAL OF ALLOYS AND COMPOUNDS 831(2020):9.