对时效硬化AA6061铝合金分别进行过冷轧制(CR)、室温轧制(RTR)后的显微组织与力学性能进行研究.通过差热分析(DSC)、电子背散射衍射技术(EBSD)、透射电镜(TEM)、维氏硬度测试、拉伸测试等分析手段对轧制态和时效态的合金进行分析.结果表明:AA6061铝合金经CR处理后,第二相析出序列发生改变.合金在过冷轧制中形成大量位错,并发生缠结形成超细晶粒结构,使得峰值时效下第二相粒子在铝基体中更加细小弥散分布.经过冷轧制后轧制态和峰值时效态下的AA6061铝合金强度和塑性较室温轧制态合金的都有很大提高.
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