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Microstructure and mechanical properties of Mg-9RY-4Cu alloy with long period stacking ordered phase

机译：长期堆积有序相Mg-9RY-4Cu合金的组织与力学性能

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摘要

The microstructure and mechanical properties of Mg-9RY (RY: Y-rich misch metal)-4Cu (wt%) alloys have been investigated. In as-cast state, the LPSO phase presents lamellar structure at grain boundaries or in the interdendritic regions and fine lamellae in Mg grains. After hot extrusion, the LPSO phase presents bent long-strip-shape distributed along the extrusion direction. The as-cast and as-extruded alloys exhibit excellent compression properties and strong work hardening responses. The high mechanical properties of as-cast alloy are mainly attributed to the hard LPSO skeleton and high-density LPSO lamellae. In as-extruded state, besides the hard LPSO phase itself serve as a strengthening phase, multiple strengthen mechanism contributes to the high mechanical properties, including the well aligned long-strip-shape morphology of LPSO phase, kinked LPSO phase and fine dynamic recrystallized (DRX) grains with fine lamellae phase. The kinking of the LPSO phase during plastic deformation is beneficial to the obvious work hardening for both as-cast and as-extruded alloys.
机译：研究了Mg-9RY（RY：富Y的稀土金属）-4Cu（wt％）合金的组织和力学性能。处于铸态时，LPSO相在晶界或枝晶间区域呈现层状结构，在Mg晶粒中呈现出细小薄片。热挤出后，LPSO相呈现出沿挤出方向分布的弯曲长条形。铸态和挤压态合金具有出色的压缩性能和强大的加工硬化响应。铸态合金的高机械性能主要归因于坚硬的LPSO骨架和高密度的LPSO薄片。在挤压状态下，除了硬LPSO相本身用作强化相外，多重强化机制还有助于获得较高的机械性能，包括LPSO相的排列良好的长条形形态，扭结的LPSO相和精细的动态重结晶（ DRX）具有细薄片相的晶粒。塑性变形过程中LPSO相的扭结有利于铸态合金和挤压合金的明显加工硬化。

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  • 来源
    《Materials Science and Engineering》 |2013年第15期|196-201|共6页
  • 作者

    Zhe Leng; Jinghuai Zhang; Tingting Yin; Li Zhang; Shujuan Liu; Milin Zhang; Ruizhi Wu;

  • 作者单位

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

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

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

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

    Department of Materials Physics and Chemistry, Harbin Institute of Technology, Harbin 150001, China;

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

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

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Mg alloys; Microstructure; Texture; Long period stacking ordered (LPSO); structure; Mechanical properties;

    机译：镁合金微观结构质地;长期堆放命令（LPSO）;结构体;机械性能;

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