研究母相时效过程中Cu-17Al-10Mn(摩尔分数,%)形状记忆合金马氏体转变温度Ms和形状记忆性能的变化规律.结果表明:合金淬火态的Ms比室温的低,室温时合金为无序母相结构,低温时可转变为马氏体;随着时效温度的提高,Cu-17Al-10Mn合金的Ms和形状恢复率均逐渐升高,并在150 ℃时效15 min后达到最大值,这主要归因于淬火空位的逸出使其对母相的钉扎作用减弱;随着时效温度的进一步提高,由于母相分解为贝氏体,合金的Ms和形状恢复率都下降,在250 ℃时效15 min后,母相完全分解,合金的形状恢复率降低到零.
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