摘要
本文通过对两种铜基形状记忆合金Cu-23.12 Zn-4.37 Al及Cu-26.34 zn-3.24 Al-0.67Mn(Wt％),在不同状态下马氏体时效稳定化的研究,提出了一种新的马氏体时效稳定化机制——应力松弛机制,即在马氏体状态下使用或放置过程中,由于微观应力松弛,破坏了马氏体变体间及马氏体与母相间界面的共格性,使变体不易合并,引起马氏体稳定化。
In this paper the memory property and the resistance to martensite aging stabilizing in Cu-23.12 Zn-4.37 Al and Cu-26.34 Zn-3.24 Al-0.67Mn (wt％) shape memory alloy under different conditions as hot rolling, marquenching and oil quenching have been studied. According to the test results, a new mechanism is proposed for martensite aging stabilizing of Cu-based shape memory alloy-stress relaxation mechanism. During the process when Cu-based shape memory alloy is used or laid aside in martensite state,the coherent interface not only among different martensite variants but also between martensite and parent phase was destroyed as a result of relaxation of microscopic internal stress. For this reason, it is difficult for different martensite variants to combine and martensites come into aging stabilizing.
