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首页> 外文期刊>Materials Science and Engineering >Effect of Nd on the microstructure and mechanical properties of Mg-8Gd-5Y-2Zn-0.5Zr alloy
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Effect of Nd on the microstructure and mechanical properties of Mg-8Gd-5Y-2Zn-0.5Zr alloy

机译：Nd对Mg-8Gd-5Y-2Zn-0.5Zr合金组织和力学性能的影响

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摘要

Microstructures and mechanical properties of the Mg-8Gd-5Y-2Zn-0.5Zr-xNd (x=0, 0.5,1 and 2 wt%) alloys in the as-cast, solid solution and as-aged conditions have been investigated. The experimental results reveal that Nd can impede the formation of LPSO phases during the solidification process and suppress the transformation of Mg_5(Gd, Y, Zn) to LPSO phase at high temperature heat-treatment. Addition of 2% Nd leads to the disappearance of the LPSO phases in the as-cast alloy. After heat-treatment at 520 ℃ for 16 h, the uniform LPSO phases, which are transformed from Mg_5(Gd, Y, Zn) phases and refined by the Nd, result in a higher solid solubility and greater aging effect. With increasing Nd content, the residual Nd-rich Mg_5(Gd, Y, Zn) phases in the solid solution alloys gradually increase and produce an adverse effect on the mechanical properties. The alloy with the addition of 0.5% Nd shows the optimal mechanical properties in the as-aged alloys, and its ultimate tensile strength, yield strength and elongation are 308 MPa, 252 MPa and 5.3%, respectively.
机译：研究了Mg-8Gd-5Y-2Zn-0.5Zr-xNd（x = 0、0.5、1和2 wt％）合金在铸态，固溶和时效条件下的组织和力学性能。实验结果表明，Nd可以阻止凝固过程中LPSO相的形成，并抑制Mg_5（Gd，Y，Zn）在高温热处理下向LPSO相的转变。添加2％Nd会导致铸态合金中LPSO相的消失。 520℃热处理16 h后，由Mg_5（Gd，Y，Zn）相转化并经Nd精制的均匀LPSO相，具有较高的固溶度和较大的老化效果。随着Nd含量的增加，固溶合金中残留的富Nd Mg_5（Gd，Y，Zn）相逐渐增加，并对力学性能产生不利影响。添加0.5％Nd的合金在时效合金中表现出最佳的机械性能，其极限抗拉强度，屈服强度和伸长率分别为308 MPa，252 MPa和5.3％。

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  • 来源
    《Materials Science and Engineering》 |2013年第1期|19-24|共6页
  • 作者

    Xingguo Zhang; Linggang Meng; Canfeng Fang; Peng Peng; Fei Ja; Hai Hao;

  • 作者单位

    School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China;

    School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China;

    School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China;

    School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China;

    School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China;

    School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Mg-Gd-Y-Zn-Zr alloy; Nd; LPSO structure; Microstructure; Mechanical property;

    机译：Mg-Gd-Y-Zn-Zr合金;Nd;LPSO结构;微观结构机械性能;

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