Thermal and morphological analysis of shape memory alloys is one of the important branches of research to obtain new characteristics. In this study, low amounts of tantalum were added into CuAlNi alloy. The alloy was produced with the induction melting method. The phase transformation of the alloys was characterized by DSC and electrical resistivity for an equal range of temperatures. The alloys showed high-temperature phase transformations. Although the α phase existed in all cases, its peak intensity in the XRD result was significantly decreased by adding Ta. The matrixes showed fine martensite plates with β₁′, and there were also coarse martensite plates with γ′. Crystallite sizes and Vickers microhardness of the alloys were decreased with increasing tantalum additive. The Cu₈₄Al₁₂Ni₃Ta wt% alloy recorded maximum elastic energy and Gibbs free energy.

中文翻译：

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Ta添加剂对感应熔炼Cu 84-x Al 13 Ni 3（wt％）形状记忆合金的影响

形状记忆合金的热学和形态分析是获得新特性的重要研究分支之一。在这项研究中，少量的钽被添加到CuAlNi合金中。该合金通过感应熔融法生产。合金的相变通过在相同温度范围内的DSC和电阻率来表征。合金显示出高温相变。尽管在所有情况下都存在α相，但通过添加Ta可以显着降低XRD结果中的峰强度。该矩阵表明细马氏体板与β ₁ '，并且也有与粗马氏体板γ'。随着钽添加剂的增加，合金的微晶尺寸和维氏显微硬度降低。Cu ₈₄ Al ₁₂ Ni ₃ Ta wt％合金记录了最大弹性能和吉布斯自由能。