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Effect of trace rare earth element Er on Al-Zn-Mg alloy 被引量:9

Effect of trace rare earth element Er on Al-Zn-Mg alloy
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摘要 Al-6Zn-2Mg and Al-6Zn-2Mg-0.4Er alloys were prepared by cast metallurgy. The effects of trace Er on the mechanical properties, recrystallization behavior and age-hardening characteristic of Al-Zn-Mg alloy were studied. The effect of Er on microstructures was also studied by OM, XRD, SEM, EDS and TEM. The results show that the addition of Er on Al-6Zn-2Mg alloy is capable of refining grains obviously. The addition of Er can improve the strength considerably by strengthening mechanisms of precipitation and grain refinement. With the addition of Er into Al-6Zn-2Mg alloy, the aging process is quickened and the age-hardening effect is heightened. Er additive can retard the recrystallizing behavior of Al-6Zn-2Mg alloy and cause the increase of recrystallization temperature due to the pinning effect of fine dispersed Al3Er precipitates on dislocations and subgrain boundaries. Al-6Zn-2Mg and Al-6Zn-2Mg-0.4Er alloys were prepared by cast metallurgy. The effects of trace Er on the mechanical properties, recrystallization behavior and age-hardening characteristic of Al-Zn-Mg alloy were studied. The effect of Er on microstructures was also studied by OM, XRD, SEM, EDS and TEM. The results show that the addition of Er on Al-6Zn-2Mg alloy is capable of refining grains obviously. The addition of Er can improve the strength considerably by strengthening mechanisms of precipitation and grain refinement. With the addition of Er into Al-6Zn-2Mg alloy, the aging process is quickened and the age-hardening effect is heightened. Er additive can retard the recrystallizing behavior of Al-6Zn-2Mg alloy and cause the increase of recrystallization temperature due to the pinning effect of fine dispersed Al3Er precipitates on dislocations and subgrain boundaries.
出处 《中国有色金属学会会刊:英文版》 EI CSCD 2006年第3期598-603,共6页 Transactions of Nonferrous Metals Society of China
基金 Project(G1999064907) supported by the National Key Fundamental Research and Development Program of China
关键词 AL-ZN-MG AL3ER 铝合金 沉淀硬化 晶粒细化 机械性能 再结晶 稀土 erbium(Er) Al-Zn-Mg alloy Al3Er precipitation strengthening fine grain strengthening mechanical properties recrystallization
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