通过硬度、OM、SEM、TEM、X射线衍射、电导率测试,研究了不同预变形量对预时效态AA7085铝合金轧制板材微观组织和性能的影响.结果表明:预时效态合金硬度较低,但分别施加11.8％、20.3％和29.7％的变形后,变形量20.3％的合金再经T6时效硬度达到最高,终时效后合金电导率随变形量增加呈增加趋势.TEM显示,预时效态合金晶内析出相非常弥散细小且密度较小,引入变形后,在合金内部产生大量位错,并且随位错密度增加,终时效合金晶内沉淀相的尺寸先增后减然后再增加,晶界析出相的分布也由连续链状变为粗大断续分布,晶间无析出带的宽度明显增大.
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