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题名: Enhanced ambient temperature creep resistance of alpha/beta-Ti alloys induced by minor Fe
作者: Huang, Sensen;  Ma, Yingjie;  Qiu, Jianke;  Wang, Hao;  Lei, Jiafeng;  Zong, Bernie Y.;  Yang, Rui
发表日期: 2017-9-29
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.
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Recommended Citation:
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.

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