| 微量Sc和Zr对Al—Mg合金铸态组织的晶粒细化作用 |
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| 引用本文： | 尹志民,高拥政.微量Sc和Zr对Al—Mg合金铸态组织的晶粒细化作用[J].中国有色金属学报,1997,7(4):75-78. |
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| 作者姓名： | 尹志民 高拥政 |
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| 作者单位： | 中南工业大学材料科学与工程系 |
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| 摘 要： | 制备了Ａｌ５Ｍｇ、Ａｌ５Ｍｇ０．２Ｓｃ、Ａｌ５Ｍｇ０．１Ｚｒ和Ａｌ５Ｍｇ０．２Ｓｃ０．１Ｚｒ四种铸态合金，采用金相显微镜和扫描电镜观察分析了微量Ｓｃ和Ｚｒ对ＡｌＭｇ合金铸态组织的晶粒细化作用及其机理。结果发现，０２％的Ｓｃ并未使ＡｌＭｇ合金产生晶粒细化作用，而０２％的Ｓｃ与０１％的Ｚｒ复合添加则使ＡｌＭｇ合金产生了极其强烈的晶粒细化作用。这一作用的产生，是由于Ｓｃ、Ｚｒ与Ａｌ在合金熔体中生成了Ａｌ３Ｓｃ和Ａｌ３Ｚｒ复合粒子，这种粒子在合金凝固过程中，起到了非均质晶核细化晶粒的作用
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| 关 键 词： | 钪 Al-Mg合金 非均质晶核 细化作用 |
EFFECT OF TRACE Sc AND Zr ON GRAIN REFINEMENT OF AS CAST Al Mg ALLOYS |
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| Yin Zhimin,Gao Yongzhen,Pan Qinglin,Zhang Yonghong,Yin Songbo Central South University of Technology,Changsha.EFFECT OF TRACE Sc AND Zr ON GRAIN REFINEMENT OF AS CAST Al Mg ALLOYS[J].The Chinese Journal of Nonferrous Metals,1997,7(4):75-78. |
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| Authors: | Yin Zhimin Gao Yongzhen Pan Qinglin Zhang Yonghong Yin Songbo Central South University of Technology Changsha |
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| Affiliation: | Yin Zhimin,Gao Yongzhen,Pan Qinglin,Zhang Yonghong,Yin Songbo Central South University of Technology,Changsha 410083 |
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| Abstract: | Al 5Mg, Al 5Mg 0.2Sc, Al 5Mg 0.1Zr and Al 5Mg 0.2Sc 0.1Zr cast alloys have been prepared. The effect of trace Sc and Zr on grain refinement of Al 5Mg cast alloy was studied using optical microscopy and scanning electron microscopy with EDS. The results showed that adding 0.2%Sc and 0.1%Zr to Al 5Mg alloy leads to strong grain refinement but adding only 0.2%Sc to Al 5Mg alloy has no grain refinement phenomenon. This is because, during solidification, Al 3Sc/Al 3Zr composite particles were formed in the melt playing a role of the nuclei of imhomogenized crystallization. |
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| Keywords: | scandium aluminium alloy grain refinement |
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