Improvement of the stability of superelasticity and elastocaloric effect of a Ni-rich Ti-Ni alloy by precipitation and grain refinement

Improvement of the stability of superelasticity and elastocaloric effect of a Ni-rich Ti-Ni alloy by precipitation and grain refinement
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通过沉淀和晶粒细化提高富镍Ti-Ni合金超弹性和弹热效应的稳定性

DOI:
10.1016/j.scriptamat.2018.11.024
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发表时间:
2019-03
期刊:
影响因子:
6
通讯作者:
Takashi Fukuda
Takashi Fukuda
中科院分区:
材料科学1区
文献类型:
--
作者:
H. Chen;F. Xiao;X. Liang;Zhenxing Li;Zhu Li;X. Jin;Na Min;Takashi Fukuda

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In this paper, we report that the superelasticity and the elastocaloric effect of Ti-50.8Ni (at.%) alloy are drastically improved by a combination of precipitation and grain refinement strengthening. The process is as follows: first, aging at 773 K after solution treatment to form coherent fine precipitate of Ti3Ni4; second, cold working followed by annealing at 673 K to form nanocrystalline grain containing Ti3Ni4. The decay of the superelasticity and the elastocaloric effect by 100 stress cycles is <10%.
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