The physical characteristics of a shape memory alloy can be controlled by different production techniques and the rate of constituents’ contribution. In this study, CuAlNiHf shape memory alloys, with three different amounts of Hf, were produced by the induction melting method. Many measurements such as differential scanning calorimetry (DSC), scanning electron microscope, energy dispersive X-ray, and the stress–strain test were carried out. The DSC measurement showed that the austenite transformation temperatures were decreased by doping more amount of hafnium into the alloy. All specimens showed a wide temperature hysteresis, which decreased by increasing Hf content. Also, the elastic modulus was raised by increasing the Hf amount. Although \({\gamma }_{1}^{{\prime}}\) and \({\beta }_{1}^{{\prime}}\) are the dominant phases in the CuAlNiHf with low Hf composition, substituting Cu with Hf enhanced the amount \({\beta }_{1}^{{\prime}}\)-phase compared to \({\gamma }_{1}^{{\prime}}\)-phase.

形状记忆合金的物理特性可以通过不同的生产技术和成分的贡献率来控制。在这项研究中，通过感应熔化法生产了具有三种不同Hf的CuAlNiHf形状记忆合金。进行了许多测量，例如差示扫描量热法（DSC），扫描电子显微镜，能量色散X射线和应力应变测试。DSC测量表明，通过向合金中掺杂更多量的ha，奥氏体转变温度降低。所有样品均表现出较宽的温度滞后性，其随Hf含量的增加而降低。另外，通过增加Hf量来提高弹性模量。虽然\（{\ gamma} _ {1} ^ {{\ prime}} \）和\（{\ beta} _ {1} ^ {{\ prime}} \）是具有低Hf组成的CuAlNiHf的主要相，用Hf代替Cu可以增强\（{\ beta} _ {1} ^ { {\ prime}} \）相相比于\（{\ gamma} _ {1} ^ {{\ prime}} \）相。