Two-way shape memory effect of polycrystalline Ni–Mn–Ga–Gd high-temperature shape memory alloys
Two-way shape memory effect of polycrystalline Ni–Mn–Ga–Gd high-temperature shape memory alloys
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DOI：
10.1016/j.scriptamat.2013.01.022
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发表时间：
2013-05
影响因子：
6
通讯作者：
J. Sui;Xin Zhang;Xiaohang Zheng;Zheyi Yang;W. Cai;X. Tian
中科院分区：
文献类型：
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作者：
J. Sui;Xin Zhang;Xiaohang Zheng;Zheyi Yang;W. Cai;X. Tian
研究了Ni54Mn25Ga21−xgdx合金的双向形状记忆效应（TWSME）。未经过热处理的ni54mn25ga20.7 gd0.3合金由于Gd(Ni,Mn)4Ga相的少量形成，TWSME值最大（2.9%），经过热处理后TWSME值增加到3.5%。TWSME在前几个热循环中迅速下降，然后随着循环次数的增加逐渐达到稳定值。最后，经过50次热循环，获得了2.5%的TWSME的原位ni54mn25ga20.7 gd0.3合金。
The two-way shape memory effect (TWSME) of polycrystalline Ni54Mn25Ga21−xGdxalloys is investigated. The largest TWSME value (2.9%) without training is observed in Ni54Mn25Ga20.7Gd0.3alloy due to a small amount of Gd(Ni,Mn)4Ga phase formation, and this value increases to 3.5% after thermomechanical training. The TWSME rapidly decreases over the first few thermal cycles, and then slowly reaches a stable value as the number of cycles increases further. Finally, a 2.5% TWSME of as-trained Ni54Mn25Ga20.7Gd0.3alloy is obtained after 50 thermal cycles.