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中文摘要：
采用常温拉伸、硬度测试、电导率测试、极化曲线、剥落腐蚀实验、金相显微镜和透射电镜等分析测试方法研究了三种时效制度（T6、T7、RRA）对Al-5.0Zn-3.0Mg-1.0Cu-0.1Zr铝合金组织和性能的影响。结果表明T6和RRA态合金较T7态合金,其晶内析出细小弥散且体积分数较高的沉淀强化相η＇相,因此强度与硬度更高;而T7和RRA态合金较T6态合金导电率更高,且其晶界析出粗大、不连续η相,其抗剥落腐蚀性能更优。RRA态合金在保持了较高强度与硬度的同时,也具有较高的抗剥落腐蚀能力。
英文摘要：
Abstract： The influences of three aging treatments （T6, T7, RRA） on the microstructure and property of A1-5.0Zn-3.0Mg- 1.0Cu-0.1Zr aluminum alloy were studied using tensile test, hardness test, conductivity tests, polarization curve, exfoliation corrosion test, OM and TEM. The results show： smaller η＇ phase with high density is obtained in the alloy with the T6 and RRA treatments compared with T7 treatment, so the alloy with T6 and RRA treatments gets higher strength and hardness. But the conductivity in the alloy with the T7 and RRA treatments is higher than that of T6 treatment, and its grain boundary precipitates coarse and discontinuous η phase, so it gets better anti-exfoliation corrosion property. Both the high strength and hardness, as well as the anti-exfoliation corrosion property can be achieved by RRA treatment.
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