| As-cast microstructure of Al-Zn-Mg and Al-Zn-Mg-Cu alloys added erbium |
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| 引用本文： | 毛建伟,金头男,徐国富,聂祚仁. As-cast microstructure of Al-Zn-Mg and Al-Zn-Mg-Cu alloys added erbium[J]. 中国有色金属学会会刊, 2005, 15(6) |
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| 作者姓名： | 毛建伟 金头男 徐国富 聂祚仁 |
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| 作者单位： | Institute of Microstructure and Property of Advanced Materials Beijing University of Technology Beijing 100022 China，Institute of Microstructure and Property of Advanced Materials Beijing University of Technology Beijing 100022 China，School of Materials Science and Engineering Central South University Changsha 410083 China，Institute of Microstructure and Property of Advanced Materials Beijing University of Technology Beijing 100022 China |
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| 基金项目： | Project(G1999064907)supportedbytheNationalKeyFundamentalResearchandDevelopmentProgramofChina |
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| 摘 要： | 1 INTRODUCTIONMany researches show that the properties ofaluminum and its alloys can be remarkablyi mproved withreasonable rare earth additions .Theactions of rare earth elements in the aluminumalloys consist in alterant-agent , micro-alloying andso on[1 3].By far element scandiumis the most ef-fective rare earth element which i mproves thealuminum alloys properties[4 6]. However , theprice of scandiumis very high.Therefore ,it s veryessential to find a new rare earth element , whichacts …
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As-cast microstructure of Al-Zn-Mg and Al-Zn-Mg-Cu alloys added erbium |
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| MAO Jian-wei,JIN Tou-nan,XU Guo-fu,NIE Zuo-ren. As-cast microstructure of Al-Zn-Mg and Al-Zn-Mg-Cu alloys added erbium[J]. Transactions of Nonferrous Metals Society of China, 2005, 15(6) |
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| Authors: | MAO Jian-wei JIN Tou-nan XU Guo-fu NIE Zuo-ren |
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| Abstract: | The effects of different contents of rare earth element, and erbium, on the as-cast microstructures of Al-6Zn-2Mg and Al-6Zn-2Mg-1.8Cu alloys were studied by optical microscopy, scanning electron microscopy, X-ray diffractometry, transmission electron microscopy and EDS analysis. The results show that the netlike structure of as-cast alloys can be remarkably refined, and the distance of dendritic structure decreases, with Er addition. However, the improvement results on Al-Zn-Mg-Cu are not better than that of Al-Zn-Mg. Er and Al can interact to form Al3Er phase, which is coherent with α(Al) matrix, with trace Er addition to the Al-Zn-Mg alloy. The refinement effect of Al-Zn-Mg alloys is familiar with the formation and precipitation of coherent Al3Er phases. The ternary compound AlCuEr, similar with AlCuSc phase, will form when Er is added to Al-Zn-Mg-Cu alloy, which suppresses the formation of Al3Er phase and doesn't solve in the following heat treatment. |
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| Keywords: | Al-Zn-Mg alloy Al-Zn-Mg-Cu alloy rare earth Er microstructure aluminum alloy refinement |
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