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Effects of La addition on the microstructure and tensile properties of Al-Si-Cu-Mg casting alloys 被引量：5

Effects of La addition on the microstructure and tensile properties of Al-Si-Cu-Mg casting alloys
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摘要 The effects of La addition on the microstructure and tensile properties of B-refmed and Sr-modified A1-1 1Si-1.5Cu-0.3Mg cast- ing alloys were investigated. With a trace addition of La （0.05wt%-0. lwt%）, the mutual poisoning effect between B and Sr can be neutral- ized by the formation of LaB6 rather than SrB6. By employing a La/B weight ratio of 2：1, uniform microstructures, which are characterized by well refined ct-A1 grains and adequately modified eutectic Si particles as well as the incorporation of precipitated strengthening intermetal- lics, are obtained and lead to appreciable tensile properties with an ultimate tensile strength of 270 MPa and elongation of 5.8%. The effects of La addition on the microstructure and tensile properties of B-refmed and Sr-modified A1-1 1Si-1.5Cu-0.3Mg cast- ing alloys were investigated. With a trace addition of La （0.05wt%-0. lwt%）, the mutual poisoning effect between B and Sr can be neutral- ized by the formation of LaB6 rather than SrB6. By employing a La/B weight ratio of 2：1, uniform microstructures, which are characterized by well refined ct-A1 grains and adequately modified eutectic Si particles as well as the incorporation of precipitated strengthening intermetal- lics, are obtained and lead to appreciable tensile properties with an ultimate tensile strength of 270 MPa and elongation of 5.8%.
作者 Tao Lu Ye Pan Ji-li Wu Shi-wen Tao Yu Chen
机构地区 School of Materials Science and Engineering Jiangsu Key Laboratory of Advanced Metallic Materials
出处 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2015年第4期405-410,共6页 矿物冶金与材料学报（英文版）
基金 supported by the Industry, Education, and Research Prospective Project of Jiangsu Province, China (No. BY2012191) the Open Research of Jiangsu Key Laboratory of Advanced Metallic Materials (No. AMM201202)
关键词 aluminum silicon alloys rare earth addition LANTHANUM MICROSTRUCTURE tensile properties PRECIPITATES aluminum silicon alloys rare earth addition lanthanum microstructure tensile properties precipitates
分类号 TG292 [金属学及工艺—铸造] TG146.21 [金属学及工艺—金属材料]
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参考文献22

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International Journal of Minerals,Metallurgy and Materials
2015年 第4期

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