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Precipitation behavior and strengthening-toughening mechanism of hot rolled sheet of Ti65 titanium alloy during aging process
Zhang, Zhixin1,3; Fan, Jiangkun1,2; Wu, Zhihong1; Zhao, Ding1; Gao, Qi3; Wang, Qinbo3; Chen, Zhiyong4; Tang, Bin1,2; Kou, Hongchao1,2; Li, Jinshan1,2
Corresponding AuthorFan, Jiangkun(jkfan@nwpu.edu.cn) ; Li, Jinshan()
2020-08-05
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume831Pages:9
AbstractAlthough 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.
KeywordTitanium alloy Mechanical property Phase transformation Silicide Strengthening and toughening
Funding OrganizationMajor State Research Development Program of China ; National Natural Science Foundation of China ; Natural Science Basic Research Plan in Shaanxi Province of China
DOI10.1016/j.jallcom.2020.154786
Indexed BySCI
Language英语
Funding ProjectMajor 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 Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000531727400005
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/138870
Collection中国科学院金属研究所
Corresponding AuthorFan, Jiangkun; Li, Jinshan
Affiliation1.Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
2.Natl & Local Joint Engn Res Ctr Precis Thermoform, Xian 710072, Shaanxi, Peoples R China
3.Baoti Grp Ltd, Baoji 721014, Shaanxi, Peoples R China
4.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
Recommended Citation
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.
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