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首页> 外文期刊>Materials Science and Engineering >Texture and mechanical behavior evolution of age-hardenable Mg-Nd-Zn extrusions during aging treatment
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Texture and mechanical behavior evolution of age-hardenable Mg-Nd-Zn extrusions during aging treatment

机译：时效硬化Mg-Nd-Zn挤压件时效过程中的织构和力学行为演变

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摘要

Three magnesium alloys containing different Nd and Zn were extruded and heat treated. The addition of Nd gives rise to the RE texture (c-axis oriented at an angle lower than 90° to the extrusion axis) in extruded Mg rods, reducing yield strength, improving tension-compression asymmetry and enhancing ductility. The Zn addition, on the other hand, weakens the RE texture by rotating the c-axes of the grains away from the extrusion axis, and also leads to the formation of a significant amount of Mg-Nd-Zn intermetallics at grain boundaries and triple points for concentrations above 0.2 vit.%. Heat treatment after extrusion causes significant age hardening as well as makes the grains reorient and further improvement on yield symmetry together. When the effect of age-hardening is included, the Mg-3.0Nd-0.2Zn-Zr (wt.%) extrusion is found to provide the best combination of strength, ductility and tension-compression asymmetry.
机译：挤压并热处理三种含有不同Nd和Zn的镁合金。 Nd的添加会在挤出的Mg棒中产生RE织构（c轴与挤出轴的角度小于90°），从而降低了屈服强度，改善了拉伸压缩不对称性并增强了延展性。另一方面，Zn的添加会通过旋转晶粒的c轴使其远离挤压轴而削弱RE的织构，并导致在晶界和三重晶界处形成大量的Mg-Nd-Zn金属间化合物浓度高于0.2 vit。％的点。挤压后的热处理会导致明显的时效硬化，并使晶粒重新定向并共同改善屈服对称性。当包括时效硬化作用时，发现Mg-3.0Nd-0.2Zn-Zr（重量％）挤压可提供强度，延展性和拉伸压缩不对称性的最佳组合。

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  • 来源
    《Materials Science and Engineering》 |2011年第2011期|p.151-155|共5页
  • 作者

    Lan Ma; Raja K. Mishra; Liming Peng; Alan A. Luo; Wenjiang Ding; Anil K. Sachdev;

  • 作者单位

    National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, PR China;

    General Motors Research and Development Center, Warren, Ml 48090, USA;

    National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, PR China,The State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240 PR China;

    General Motors Research and Development Center, Warren, Ml 48090, USA;

    National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, PR China,The State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240 PR China;

    General Motors Research and Development Center, Warren, Ml 48090, USA;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    magnesium alloy rare earth texture yield symmetry twinning;

    机译：镁合金稀土屈服对称性孪晶。;

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