Cu-Zn-Al合金热弹性马氏体稳定化及单向记忆寿命估计

来源期刊：中南大学学报(自然科学版)1988年第2期

论文作者：汪明朴 刘锦文 王峰

文章页码：179 - 186

关键词：铜基合金； 锌合金； 铝合金； 马氏体； 热特性； 分级淬火； 稳定性； 使用寿命/Cu-Zn-Al合金； 热弹性； 形状记忆合金； 稳定化

Key words：copper-base alloys； zinc-alloys； aluminium alloys； martensite； elasticity； thermal characteristics； martempering； stability； service life/Cu-Zn-Al alloys； termoelastity； shape memory alloys； stabilization

摘    要：本文研究了Cu-Zn-Al合金热弹性马氏体稳定化问题。实验表明,不论直接淬火或分级淬火的合金,当其在马氏体状态时效时,都会发生热弹性马氏体稳定化现象,但后者稳定化速率大为减小,其激活能远大于前者。这一结果可用来估计单向记忆寿命。此外,本文还从结构上研究了马氏体稳定化机理,认为再有序化和空位钉扎是影响马氏体稳定化的诸多因素中的两个重要因素。

Abstract: The stabilization of thermoelastic martensite in Cu-Zn-Al alloys has been stud-ied.It is shown that when the alloys are aged in the martensite state,the marten-sites,both in direct quenched alloy and step quenched alloy,become stabilized.Butthe martensite stabilization rate of the latter is far smaller than that of the formerand a contrary result exists in activation energy.The experiment results above canbe used to estimate one way memory life of the alloys.Moreover,the machanism ofthe martensite stabilization has been studied.It is suggested that the reordering ofthe martensite and pinning by the excess quenched-in vacancies would be the twoimportant factors among other factors affecting the martensite stabilization.