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首页> 外文期刊>Materials Science and Engineering >Effect of Gd and Y contents on the microstructural evolution of long period stacking ordered phase and the corresponding mechanical properties in Mg-Gd-Y-Zn-Mn alloys
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Effect of Gd and Y contents on the microstructural evolution of long period stacking ordered phase and the corresponding mechanical properties in Mg-Gd-Y-Zn-Mn alloys

机译：Gd和Y含量对Mg-Gd-Y-Zn-Mn合金长期堆放有序相组织演变及相应力学性能的影响

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摘要

This study analyzes the effect of different Gd and Y contents on the microstructural evolution and mechanical properties of Mg-Gd-Y-Zn-Mn alloys. Microstructural analysis indicates the existence of both the long period stacking order and eutectic phases in the as-cast alloys. In case of alloys with high Gd and low Y contents, the main eutectic phase is (Mg,Zn)_3(Gd, Y), while in alloys with high Y and low Gd contents, the main eutectic phase is Mg_(24)(Gd,Y,Zn)_5. The as-annealed alloys show only α-Mg and LPSO phases; the LPSO phases could be bulk-shaped and lamellar-shaped. The main composition of the LPSO phase with gray bulk-shaped morphology is Mg_(12)ZnY, while the LPSO phase that penetrated thoroughly the grain is mainly Mg_(12)ZnGd. After extrusion, the formation of distorted grains and lamellar-shaped LPSO phases in the alloys with high Gd and low Y contents tends to improve the strength of the as-extruded alloys, while the formation of isometric crystal grains in the alloys with high Y and low Gd contents enhances the alloy elongation.
机译：本研究分析了不同的Gd和Y含量对Mg-Gd-Y-Zn-Mn合金的组织演变和力学性能的影响。显微组织分析表明，铸态合金既存在长时程堆积顺序又存在共晶相。对于高Gd和低Y含量的合金，主要的共晶相为（Mg，Zn）_3（Gd，Y），而对于高Y和低Gd含量的合金，主要的共晶相是Mg_（24）（ Gd，Y，Zn）_5。退火后的合金仅显示出α-Mg和LPSO相。 LPSO相可以是块状和层状。具有灰色块状形态的LPSO相的主要成分是Mg_（12）ZnY，而穿透晶粒的LPSO相主要是Mg_（12）ZnGd。挤压后，在高Gd和低Y含量的合金中形成扭曲的晶粒和层状LPSO相往往会提高刚挤压合金的强度，而在高Y和高Y合金中形成等距晶粒。低的Gd含量会提高合金的延伸率。

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  • 来源
    《Materials Science and Engineering》 |2014年第26期|363-370|共8页
  • 作者

    Song Huang; Jingfeng Wang; Fan Hou; Xiuhong Huang; Fusheng Pan;

  • 作者单位

    National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, PR China;

    National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, PR China;

    National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, PR China;

    National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, PR China;

    National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, PR China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Magnesium alloy; Microstructure; Mechanical property; Long-period stacking ordered phase;

    机译：镁合金微观结构机械性能长期堆叠有序相;

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