采用扫描电镜、透射电镜、X射线衍射及硬度测试等手段研究了添加2at%Cu的AlZn对称成分合金在冷轧后重新加热过程中的组织结构变化.结果发现:该合金不连续析出组织在冷变形后重新加热时发生了再结晶,以连续粗化与不连续粗化2种机制进行,再结晶温度约为100℃;而且相组成物由Al相、Zn相和细小的ε相转变为Al相、Zn相和粗大的T′相.AlZn-2Cu合金不连续析出组织在冷变形后重新加热时,硬度的变化是由再结晶软化、T′相粗化以及Zn原子的固溶强化共同影响的结果.
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