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首页> 外文期刊>Materials Science and Engineering >Effects of heat treatment on the morphology of long-period stacking ordered phase and the corresponding mechanical properties of Mg-9Gd-xEr-1.6Zn-0.6Zr magnesium alloys
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Effects of heat treatment on the morphology of long-period stacking ordered phase and the corresponding mechanical properties of Mg-9Gd-xEr-1.6Zn-0.6Zr magnesium alloys

机译：热处理对Mg-9Gd-xEr-1.6Zn-0.6Zr镁合金长周期堆积有序相形态及相应力学性能的影响

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摘要

This study investigates the effects of heat treatment on the morphology of long-period stacking ordered phase (LPSO) and the corresponding mechanical properties of Mg-9Gd-xEr-1.6Zn-0.6Zr (1-4 wt%) using optical microscopy, scanning electron microscopy, energy-dispersive X-ray spectrometry. X-ray diffraction, transmission electron microscopy, and tensile tests. The microstructure analysis of the as cast alloys showed that the volume fraction of the (Mg, Zn)_3(Gd, Er) phase increased with increasing Er content. The (Mg, Zn)_3(Gd, Er) phase in grain boundaries transformed into the 14H-LPS0 phase Mg_(12)Zn(Gd, Er) after heat treatment between 400 ℃ and 515 ℃. The bulk shaped LPSO phases distributed along the grain boundaries produced isometric crystal grains in and enhanced the ductility of the as-extruded alloys. However, the lamellar LPSO phases precipitating in the grain interior induced strip-shaped grains in and improved the strength of the as-extruded alloys.
机译：本研究利用光学显微镜，扫描技术研究了热处理对长周期堆积有序相（LPSO）形态和Mg-9Gd-xEr-1.6Zn-0.6Zr（1-4 wt％）的相应力学性能的影响电子显微镜，能量色散X射线光谱法。 X射线衍射，透射电子显微镜和拉伸试验。铸态合金的显微组织分析表明，（Mg，Zn）_3（Gd，Er）相的体积分数随Er含量的增加而增加。晶界中的（Mg，Zn）_3（Gd，Er）相经过400℃至515℃的热处理后转变为14H-LPS0相Mg_（12）Zn（Gd，Er）。沿晶界分布的大块状LPSO相在挤压合金中产生等轴晶粒并增强了延展性。但是，层状LPSO相在晶粒内部析出，导致条状晶粒进入并改善了挤压合金的强度。

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  • 来源
    《Materials Science and Engineering》 |2013年第15期|36-45|共10页
  • 作者

    Jingfeng Wang; Pengfei Song; Song 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;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    magnesium alloys; heat treatment; morphology; mechanical property; long-period stacking ordered phase;

    机译：镁合金热处理;形态学;机械性能长周期堆积有序相;

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