Enhanced ambient temperature creep resistance of alpha/beta-Ti alloys induced by minor Fe

IMR OpenIR

	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
发表期刊	ELSEVIER SCIENCE SA
ISSN	0921-5093
卷号	705 页码:169-175
摘要	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.; 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.
部门归属	[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
关键词	Titanium Alloy Creep Dislocation Diffusion Fe Content
学科领域	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助者	Natural Science Foundation of China [51401221, 51671195]
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/79082
专题	中国科学院金属研究所
通讯作者	Ma, YJ; Lei, JF (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.
推荐引用方式 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.