Two-way shape memory effect in ferromagnetic Co35Ni35Al30 single crystals aged under stress
Two-way shape memory effect in ferromagnetic Co35Ni35Al30 single crystals aged under stress
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DOI：
10.1016/j.scriptamat.2014.06.034
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发表时间：
2014-11
影响因子：
6
通讯作者：
E. Panchenko;Y. Chumlyakov;A. Eftifeeva;H. Maier
中科院分区：
文献类型：
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作者：
E. Panchenko;Y. Chumlyakov;A. Eftifeeva;H. Maier
在本研究中，实验证明，在673 K下，沿[1¯2 3]方向的拉伸应力下时效0.5 h，为观察Co 35 Ni 35 Al 30单晶的双向形状记忆效应（TWSME）创造了必要的条件，可逆拉伸应变高达ε=+ 1.8%。应力辅助时效过程中分散颗粒的定向排列产生了内部应力场。相反，在无应力老化[1¯2 3]取向晶体中没有观察到TWSME。
In the present study it is experimentally demonstrated that aging at 673 K for 0.5 h under a tensile stress along the [1¯ 2 3] direction creates the necessary conditions for observing the two-way shape memory effect (TWSME) with reversible tensile strains up to ε=+ 1.8% in Co 35 Ni 35 Al 30 single crystals. The TWSME is attributed to the internal stress fields created by the oriented arrangement of the dispersed particles resulting from the stress-assisted aging. In contrast, the TWSME was not observed in stress-free aged [1¯ 2 3]-oriented crystals.