Microstructure and Properties of Al-Mg-Sc Alloy

Wei Huakai~1; Hu Fangyou~1; Guan Renguo~2

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Microstructure and Properties of Al-Mg-Sc Alloy
Issue 11, Pages: 739-741(2006)
Published： 2006 ，
DOI：

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[1]魏华凯,胡芳友,管仁国.Al-Mg-Sc合金的组织和性能[J].特种铸造及有色合金,2006(11):739-741+679.

Wei Huakai~1, Hu Fangyou~1, Guan Renguo~2. Microstructure and Properties of Al-Mg-Sc Alloy. [J]. Special Casting & Nonferrous Alloys (11):739-741(2006)
[1]魏华凯,胡芳友,管仁国.Al-Mg-Sc合金的组织和性能[J].特种铸造及有色合金,2006(11):739-741+679. DOI：

Wei Huakai~1, Hu Fangyou~1, Guan Renguo~2. Microstructure and Properties of Al-Mg-Sc Alloy. [J]. Special Casting & Nonferrous Alloys (11):739-741(2006) DOI：

摘要

针对飞机战伤抢修和日常维修工作发展的要求

自行研制了具有高的综合力学性能的Al-5Mg-0·3Sc板材

利用金相显微镜、扫描电镜等分析手段研究了Sc对Al-Mg合金组织、性能的影响规律。试验研究表明:添加质量分数为0·3%的Sc的Al-Mg合金铸态组织得到显著细化

枝晶组织在相当程度上得到消除;Al-5Mg-0·3Sc的力学性能和2A12（LY12）的力学性能相当

而Al-5Mg-0·3Sc比2A12有较高的抗海水腐蚀能力;Al-5Mg-0·3Sc板材可以替代2A12板材作为飞机损伤铝合金结构板材的修复材料。

Abstract

Al-5Mg-0.3Sc alloy plate with high comprehensive properties has been developed.Effects of Sc on microstructure and properties of Al-Mg alloy were observed by OM and SEM.The results show that 0.3% Sc addition can significantly refine as-cast structure in Al-Mg alloy so that major dendritic structure can disappears in the microstructure.Al-5Mg-0.3Sc alloy is equivalent to 2Al2（LY12）alloy in mechanical proerties but is higher than ones in corrosion resistance in sea-water.So the Al-5Mg-0.3Sc alloy can take place 2A12 alloy plate to be used as repairing material for failure aluminum structure plate in the plane.