向TiNi形状记忆合金中添加第三或第四组元是改变它们相变特性的有效途径。人们发现，添加Co、Fe、Cr等能降低TiNi基形状记忆合金马氏体转变温度，而添加Hf、Pd能提高TiNi基形状记忆合金马氏体转变温度；此外，添加铜能降低TiNi基形状记忆合金的相变滞后宽度，而添加铌则增大TiN The addition of the third or fourth component to the TiNi shape memory alloy is an effective way to change their phase transition characteristics. It was found that the addition of Co, Fe, Cr can reduce the TiNi-based martensitic transformation temperature of the shape memory alloy, and adding Hf, Pd can increase the TiNi-based martensitic martensitic transformation temperature; In addition, the addition of copper can reduce the TiNi-based shape The phase transition hysteresis width of the memory alloy increases with the addition of niobium