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Structure and properties of an ultra-high strength 7xxx aluminum alloy contained Sc and Zr 被引量：8

Structure and properties of an ultra-high strength 7xxx aluminum alloy contained Sc and Zr
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摘要 An ultra-high strength aluminum alloy was produced by casting and then extruded to rods. The effect of heat treatment on the microstructure and mechanical properties of the alloy was investigated. After single ageing （120℃, 24 h）, the tensile strength was 812.4 MPa and the elongation was 6.2%. After retrogression reaging （RRA）, the tensile strength was 751.2 MPa and the elongation was 6.4%. The strengthening mechanism is considered as fine grain strengthening, substructure strengthening and dispersion strengthening by Al3（Sc, Zr）. An ultra-high strength aluminum alloy was produced by casting and then extruded to rods. The effect of heat treatment on the microstructure and mechanical properties of the alloy was investigated. After single ageing （120℃, 24 h）, the tensile strength was 812.4 MPa and the elongation was 6.2%. After retrogression reaging （RRA）, the tensile strength was 751.2 MPa and the elongation was 6.4%. The strengthening mechanism is considered as fine grain strengthening, substructure strengthening and dispersion strengthening by Al3（Sc, Zr）.
作者 Xiaoyuan Dai Changqing Xia Xiaomin Peng Ke Ma
机构地区 School of Materials Science and Engineering School of Materials Science and Engineering
出处 《Journal of University of Science and Technology Beijing》 CSCD 2008年第3期276-279,共4页 北京科技大学学报（英文版）
基金 the National Key Fundamental Research and Development Program of China(No.2005CB623706).
关键词 aluminum alloy SCANDIUM ZIRCONIUM microstructure mechanical properties strengthening mechanism aluminum alloy scandium zirconium microstructure mechanical properties strengthening mechanism
分类号 TG146.21 [金属学及工艺—金属材料]
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参考文献13

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Journal of University of Science and Technology Beijing
2008年 第3期

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