Abstract Shape recovery in conventional shape memory alloys is typically a relatively slow process showing low heating rate sensitivity. In contrast to that, some shape memory alloys such as Ni–Fe–Ga–Co, Cu–Al–Ni, Cu–Al–Fe–Mn can exhibit the effect of burst-like shape recovery when the original shape is restored almost instantaneously in a very narrow temperature range. Here we report on an abnormal stress-strain behavior of Ni49Fe18Ga27Co6 single crystals upon uniaxial compression along the [110] axis and caloric effects during burst-like recovery of shape memory strain in the samples. Differential scanning calorimetry (DSC) study revealed that DSC peak shifts to lower temperatures with increasing heating rate.

中文翻译：

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Ni-Fe-Ga-Co单晶形状记忆合金中的爆裂形状恢复和热量效应

摘要 传统形状记忆合金的形状恢复通常是一个相对缓慢的过程，显示出低加热速率敏感性。与此相反，一些形状记忆合金，如 Ni-Fe-Ga-Co、Cu-Al-Ni、Cu-Al-Fe-Mn，当几乎瞬间恢复原始形状时，可以表现出爆裂状形状恢复效果在很窄的温度范围内。在这里，我们报告了 Ni49Fe18Ga27Co6 单晶在沿 [110] 轴单轴压缩时的异常应力-应变行为以及样品形状记忆应变爆发式恢复期间的热量效应。差示扫描量热法 (DSC) 研究表明，随着加热速率的增加，DSC 峰向较低温度移动。