| 引用本文: | 周昌荣,潘青林.微量钪对高Cu/Mg比Al-Cu-Li-Mg合金组织与性能的影响[J].材料科学与工艺,2010,18(3):438-441.DOI:10.11951/j.issn.1005-0299.20100331. |
| ZHOU Chang-rong,PAN Qing-lin.The effect of addition of minor Sc on microstructure and tensile property of high ratio of Cu to Mg of Al-Cu-Li-Mg alloys[J].Materials Science and Technology,2010,18(3):438-441.DOI:10.11951/j.issn.1005-0299.20100331. |
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| 摘要: |
| 利用金相显微镜、透射电子显微镜和拉伸试验等手段,研究了微量Sc对高Cu/Mg比Al-3.5Cu-1.5Li-0.5Mg-0.12Zr合金组织和拉伸性能的影响.结果表明:在Al-3.5Cu-1.5Li-0.5Mg-0.12Zr合金中加入0.10%Sc消除了合金铸态枝晶组织,有效抑制合金再结晶,明显提高了合金的强度和塑性,但晶粒细化效果不明显;添加0.15%和0.25%Sc显著细化合金铸态晶粒组织,塑性随Sc增加而提高,但添加0.25%Sc促进合金再结晶,合金强度显著降低. |
| 关键词: Al—Li合金 含Sc铝合金 显微组织 Al3Sc |
| DOI：10.11951/j.issn.1005-0299.20100331 |
| 分类号:TG146.21 |
| 基金项目:国家高技术发展计划资助项目(2002AA305104) |
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| The effect of addition of minor Sc on microstructure and tensile property of high ratio of Cu to Mg of Al-Cu-Li-Mg alloys |
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ZHOU Chang-rong1,2, PAN Qing-lin2
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1.School of Material and Engineering,Guilin University of Electronic Technology,Guilin 541004,China;2.School of Material Science and Engineering,Central South University,Changsha 410083,China
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| Abstract: |
| The effect of minor Sc additions on microstructure and tensile property of Al-3.5Cu-1.5Li 0.5Mg-0.12Zr alloy has been investigated by OM,TEM and tensile test.The results show that addition of 0.10% scandium can obviously improve the strength and elogation,eliminate the dendrite,and strongly restrain the recrystallization of the alloy.The addition of 0.15% and 0.25% scandium causes obvious grain refinement,and the elongation increases with the increasing addition Sc.However,the addition of 0.25% scandium accelerates the recrystallization and reduces the strength of the alloy. |
| Key words: Al—Li alloy microstructure Al3Sc aluminum alloy containing Sc |
