制备了可以呈现两种相变行为的Ti50.6Ni19.4Pd30高温形状记忆合金.力学性能试验结果表明,与B2-B19一阶相变的合金试样相比,当合金呈现B2-B19-B19'两阶相变时,试样的力学性能差异明显.在一阶相变的合金试样的断口形貌上观察到了较多的空洞和韧窝.两种合金试样在亚稳奥氏体状态下,都获得了完全的线性伪弹性.由于B19'相较大的弹性模量,B19'-B19相变使得两阶相变合金弹性模量曲线在相变区表现为一个台阶,B2-B19相变对应于曲线的凹谷.
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