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首页> 外文期刊>Materials & design >Effect of substituting cerium-rich mischmetal with lanthanum on microstructure and mechanical properties of die-cast Mg-Al-RE alloys
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Effect of substituting cerium-rich mischmetal with lanthanum on microstructure and mechanical properties of die-cast Mg-Al-RE alloys

机译：镧代替富铈混合稀土对压铸Mg-Al-RE合金组织和力学性能的影响

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摘要

Die-cast Mg-4Al-4RE-0.4Mn (RE = Ce-rich mischmetal) and Mg-4Al-4La-0.4Mn magnesium alloys were prepared successfully and their microstructure, tensile and creep properties have been investigated. The results show that two binary Al-RE phases, Al_(11)RE_3 and Al_2RE, are formed along grain boundaries in Mg-4Al-4RE-0.4Mn alloy, while the phase compositions of Mg-4Al-4La-0.4Mn alloy mainly consist of α-Mg phase and Al_(11)La_3 phase. And in Mg-4Al-4La-0.4Mn alloy the Al_(11)La_3 phase occupies a large grain boundary area and grows with complicated morphologies, which is characterized by scanning electron microscopy in detail. Changing the rare earth content of the alloy from Ce-rich mischmetal to lanthanum gives a further improvement in the tensile and creep properties, and the later could be attributed to the better thermal stability of Al_(11)La_3 phase in Mg-4Al-4La-0.4Mn alloy than that of Al_(11)RE_3 phase in Mg-4Al-4RE-0.4Mn alloy.
机译：成功制备了压铸Mg-4Al-4RE-0.4Mn（RE =富Ce的稀土金属）和Mg-4Al-4La-0.4Mn镁合金，并研究了它们的组织，拉伸性能和蠕变性能。结果表明，Mg-4Al-4RE-0.4Mn合金沿晶界形成了二元Al-RE相Al_（11）RE_3和Al_2RE，而Mg-4Al-4La-0.4Mn合金的相组成主要为由α-Mg相和Al_（11）La_3相组成。在Mg-4Al-4La-0.4Mn合金中，Al_（11）La_3相占据较大的晶界面积，并以复杂的形貌生长，这是通过扫描电子显微镜观察得出的。将合金中的稀土含量从富铈的稀土金属改变为镧，可以进一步改善抗拉强度和蠕变性能，后者可归因于Al_（11）La_3相在Mg-4Al-4La中的更好的热稳定性。 Mg-4Al-4RE-0.4Mn合金中的Al_（11）RE_3相比-0.4Mn合金。

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  • 来源
    《Materials & design》 |2009年第7期|2372-2378|共7页
  • 作者

    Jinghuai Zhang; Peng Yu; Ke. Liu; Daqing Fang; Dingxiang Tang; Jian Meng;

  • 作者单位

    State Key laboratory of Rare Earth Resources Application, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China Graduate School of the Chinese Academy of Science, Beijing 100049, China Changchun Seemay Magnesium Co. Ltd., Changchun, China;

    School of Biological Engineering, Changchun University of Technology, Changchun 130012, China;

    State Key laboratory of Rare Earth Resources Application, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China Graduate School of the Chinese Academy of Science, Beijing 100049, China Changchun Seemay Magnesium Co. Ltd., Changchun, China;

    State Key laboratory of Rare Earth Resources Application, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China Changchun Seemay Magnesium Co. Ltd., Changchun, China;

    State Key laboratory of Rare Earth Resources Application, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China Changchun Seemay Magnesium Co. Ltd., Changchun, China;

    State Key laboratory of Rare Earth Resources Application, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Mg-Al-RE alloy; lanthanum; microstructure; mechanical properties;

    机译：Mg-Al-RE合金;镧;微观结构机械性能;

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