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Enhanced ambient temperature creep resistance of alpha/beta-Ti alloys induced by minor Fe
Huang, Sensen; Ma, Yingjie; Qiu, Jianke; Wang, Hao; Lei, Jiafeng; Zong, Bernie Y.; Yang, Rui; Ma, YJ; Lei, JF (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.
2017-09-29
Source PublicationELSEVIER SCIENCE SA
ISSN0921-5093
Volume705Pages:169-175
AbstractIt is generally accepted that the addition of Fe deteriorates the creep behavior of titanium alloys at elevated temperature. However, the effect of Fe at ambient temperature is not well documented. In this paper, the creep performance of an alpha/beta titanium alloy with different Fe contents (0.05 and 0.20 wt%) was systematically studied at temperatures from the ambient to 500 degrees C. Creep resistance of samples with 0.20 wt% Fe was found to decrease at temperatures above 300 degrees C, but to increase at ambient temperature and 200 degrees C. The resulting stress exponent was in the range of 4.7-14.4, corresponding with dislocation creep. The fitted creep activation energy fell into two categories, i.e., 1) comparable with the self-diffusion activation energy of alpha-Ti at elevated temperature, and 2) remarkably higher than the former at 200-400 degrees C. The underlying mechanisms controlling creep processes at different temperatures were discussed.; It is generally accepted that the addition of Fe deteriorates the creep behavior of titanium alloys at elevated temperature. However, the effect of Fe at ambient temperature is not well documented. In this paper, the creep performance of an alpha/beta titanium alloy with different Fe contents (0.05 and 0.20 wt%) was systematically studied at temperatures from the ambient to 500 degrees C. Creep resistance of samples with 0.20 wt% Fe was found to decrease at temperatures above 300 degrees C, but to increase at ambient temperature and 200 degrees C. The resulting stress exponent was in the range of 4.7-14.4, corresponding with dislocation creep. The fitted creep activation energy fell into two categories, i.e., 1) comparable with the self-diffusion activation energy of alpha-Ti at elevated temperature, and 2) remarkably higher than the former at 200-400 degrees C. The underlying mechanisms controlling creep processes at different temperatures were discussed.
description.department[huang, sensen ; ma, yingjie ; qiu, jianke ; wang, hao ; lei, jiafeng ; yang, rui] chinese acad sci, inst met res, shenyang 110016, liaoning, peoples r china ; [huang, sensen ; zong, bernie y.] northeastern univ, sch mat & engn, shenyang 110089, liaoning, peoples r china ; [huang, sensen ; zong, bernie y.] northeastern univ, key lab anisotropy & texture mat, shenyang 110089, liaoning, peoples r china
KeywordTitanium Alloy Creep Dislocation Diffusion Fe Content
Subject AreaNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNatural Science Foundation of China [51401221, 51671195]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79082
Collection中国科学院金属研究所
Corresponding AuthorMa, YJ; Lei, JF (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.
Recommended Citation
GB/T 7714
Huang, Sensen,Ma, Yingjie,Qiu, Jianke,et al. Enhanced ambient temperature creep resistance of alpha/beta-Ti alloys induced by minor Fe[J]. ELSEVIER SCIENCE SA,2017,705:169-175.
APA Huang, Sensen.,Ma, Yingjie.,Qiu, Jianke.,Wang, Hao.,Lei, Jiafeng.,...&Lei, JF .(2017).Enhanced ambient temperature creep resistance of alpha/beta-Ti alloys induced by minor Fe.ELSEVIER SCIENCE SA,705,169-175.
MLA Huang, Sensen,et al."Enhanced ambient temperature creep resistance of alpha/beta-Ti alloys induced by minor Fe".ELSEVIER SCIENCE SA 705(2017):169-175.
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