分级淬火对Cu-Zn-Al形状记忆合金热弹性马氏体转变的影响

来源期刊：中南大学学报(自然科学版)1985年第4期

论文作者：曹明盛 鲁小叶

文章页码：37 - 44

关键词：形状记忆合金； 热弹性马氏体稳定化； 分级淬火； 马氏体相； 马氏体转变； 再有序化； 转变温度； 可逆转变； 温度曲线； 有序转变

摘    要：本文用直流电阻法研究了分级淬火对Cu-14.84wt% Zn-7.75wt%Al形状记忆合金热弹性马氏体转变的影响。实验结果表明:中间停留温度T_s低于M_f或高于T_DO3,s的分级淬火,将使热弹性马氏体稳定化;T_s位于M_f至M_s或T_DO3,f至T_DO3,s之间的分级淬火,将使部分热弹性马氏体稳定化;但T_f位于M_s至T_DO3,f之间的分级淬火,则可使热弹性马氏体完全避免稳定化。认为热弹性马氏体的稳定化,主要与B₂→DO₃有序转变被淬火抑制,致使随后冷却时刚形成的马氏体不稳定而再有序化有关。

Abstract: The effect of step quenching on the thermoelastic martensite transfor-mation of Cu-14.84 wt% Zn-7.75 wt% Al shape memory alloy has beeninvestigated by means of resistance measurement. It is shown that thestep quenching at Ts below Mf or above T_DO3,S makes the martensitestabilize, and that the step quenching at Ts between M_f and M_s orbetween T_DO3,f and T_DO3,S makes a part of the martensite stabilize, but thestep quenching at T_S between M_S and T_DO3,f can make the martensitecompletely avoid stabilizing. The stabilization of the thermoelastic marten-site may mainly depend on the martensite reordering, due to B₂→DO₃ orderreaction suppressed by quenching.