IC-218合金在不同变形量冷轧后,表现出不同的退火行为.在500℃以下退火时,60%冷轧试样表现出时效硬化,而20%冷轧试样则呈现单调软化.结合热分析和X光衍射峰展宽量分析,发现这种硬化与软化与有序恢复进程相关.在600℃以上,两种变形试样都表现出回复软化,但在温度不太高时,60%冷轧试样的回复程度远低于20%冷轧试样,随着温度进一步升高,两种试样的回复程度趋于相同.实验结果定性地支持Cahn关于有序合金时效硬化的半有序判据和相关的机理模型.
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