The properties of two-phase Ni–Al–Fe shape memory alloys in the virgin and shape-memory-cycled states
The properties of two-phase Ni–Al–Fe shape memory alloys in the virgin and shape-memory-cycled states
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DOI：
10.1016/s0921-5093(99)00310-x
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发表时间：
1999-12
期刊：
影响因子：
6.4
通讯作者：
N. Ono;A. Tsukahara;R. Kainuma;K. Ishida
中科院分区：
文献类型：
--
作者：
N. Ono;A. Tsukahara;R. Kainuma;K. Ishida
Five polycrystalline Ni–Al–Fe alloys with 14–26 (at.)% Al and 16–26% Fe were made and heat-treated to have β and γ dual phases with from 87% to less than 1% of β phase and to exhibit Mstemperatures at about 300 K. Depending on the β phase fraction and prestraining temperature, the alloys showed pseudoelastic strain recovery ratio from 1–2 up to 35% and shape memory strain recovery ratio from over 10–90% after prestraining by up to 1%. In the alloy with 87% β phase, the latter ratio reached 100% against 0.8% prestrain after a few cycles of shape memory training. Observed results were analyzed based on a model that assumed a simple linear mixture of the properties of the β and γ phases. The results of the analysis suggest that the γ phase after the training in certain conditions is almost elastic and thus acts as a bias spring.
