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首页> 外文期刊>Materials Science and Engineering >Effects of Ce-rich RE additions and heat treatment on the microstructure and tensile properties of Mg-Li-Al-Zn-based alloy
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Effects of Ce-rich RE additions and heat treatment on the microstructure and tensile properties of Mg-Li-Al-Zn-based alloy

机译：富铈稀土添加和热处理对Mg-Li-Al-Zn基合金显微组织和拉伸性能的影响

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摘要

As-cast Mg-5Li-3Al-2Zn-xRE (x = 0-2.5 wt.%) alloys were prepared under the ambient of pure argon, and the effects of Ce-rich rare earths (RE) and heat treatment on the microstructure and mechanical properties of Mg-Li-Al-Zn-based alloy were investigated. The results show that the main phase compositions of Mg-5Li-3Al-2Zn (LAZ532) alloy consist of α-Mg and AlLi. With the addition of RE, Al-RE precipitate forms, and increases gradually, whereas AlLi phase decreases. The room temperature tensile test reveals that the addition of RE could clearly improves the mechanical properties of alloys which are further improved after heat treatment. In more detail, excellent tensile strength and ductility are obtained in 1.5 wt.% RE containing alloy in as-cast state. After heat treatment, the 1.0 wt.% RE containing alloy attains superior tensile strength. The differences in tensile strength are related to the morphology, distribution of second phases and solid-solution strengthening in different alloy systems. In addition, the fracture pattern of the alloy is predominantly brittle cleavage and tends to be quasi-cleavage with RE addition.
机译：在纯氩气的环境下，制备了铸态Mg-5Li-3Al-2Zn-xRE（x = 0-2.5 wt。％）合金，并研究了富铈稀土（RE）和热处理对显微组织的影响研究了Mg-Li-Al-Zn基合金的力学性能。结果表明，Mg-5Li-3Al-2Zn（LAZ532）合金的主要相组成为α-Mg和AlLi。随着RE的添加，Al-RE沉淀形成，并逐渐增加，而AlLi相减少。室温拉伸试验表明，添加稀土可以明显改善合金的机械性能，热处理后可以进一步改善。更详细地，在铸态的含1.5wt。％RE的合金中获得优异的拉伸强度和延展性。热处理后，含1.0 wt。％RE的合金获得了优异的拉伸强度。抗张强度的差异与不同合金体系中的形态，第二相的分布和固溶强化有关。另外，合金的断裂模式主要是脆性断裂，并且在添加RE的情况下趋于准断裂。

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  • 来源
    《Materials Science and Engineering》 |2011年第5期|p.2174-2179|共6页
  • 作者

    Libin Wu; Chongliang Cui; Ruizhi Wu; Jiqing Li; Haibo Zhan; Milin Zhang;

  • 作者单位

    Key Laboratovy of Superlight Materials (&)Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, China;

    Key Laboratovy of Superlight Materials (&)Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, China;

    Key Laboratovy of Superlight Materials (&)Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, China;

    Key Laboratovy of Superlight Materials (&)Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, China;

    Key Laboratovy of Superlight Materials (&)Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, China;

    Key Laboratovy of Superlight Materials (&)Surface Technology, Ministry of Education, Harbin Engineering University, Harbin 150001, China;

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  • 正文语种 eng
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  • 关键词

    mg-li-al-zn-re alloys heat treatment microstructure tensile properties;

    机译：mg-li-al-zn-re合金热处理显微组织拉伸性能;

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