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Enhanced strength and ductility of Mg-RE-Zn alloy simultaneously by trace Ag addition

机译：微量Ag的加入同时增强了Mg-RE-Zn合金的强度和塑性。

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摘要

The effects of Ag on the microstructure and mechanical properties of a Mg-9Gd-3Y-1Zn-0.8Mn alloy have been investigated. Microstructural analysis indicates that the (Mg,Zn)3(Gd,Y)-type eutectic phase in the as-cast alloys transform into LPSO phase during solution treatment. The presence of Ag atom facilitates the formation of lamellar LPSO phase in the grain, which restrains recrystallization behavior during extrusion. The formation of beta' and gamma' phases can be remarkably promoted by Ag addition during aging treatment. The co-precipitation of beta' and gamma' phases generates an approximate enclosed microstructure which endows the alloy with ultra-high strength and favorable ductility.
机译：研究了Ag对Mg-9Gd-3Y-1Zn-0.8Mn合金组织和力学性能的影响。显微组织分析表明，铸态合金中的（Mg，Zn）3（Gd，Y）型共晶相在固溶处理过程中转变为LPSO相。 Ag原子的存在促进了晶粒中层状LPSO相的形成，从而限制了挤压过程中的再结晶行为。在时效处理过程中，添加Ag可以显着促进β'和γ'相的形成。 β'和γ'相的共沉淀产生了近似封闭的微观结构，使合金具有超高强度和良好的延展性。

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  • 来源
    《Materials Science and Engineering》 |2018年第13期|10-19|共10页
  • 作者

    Wang Jingfeng; Wang Kui; Hou Fan; Liu Shijie; Peng Xing; Wang Jinxing; Pan Fusheng;

  • 作者单位

    Chongqing Univ, Coll Mat Sci & Engn, Natl Engn Res Ctr Magnesium Alloys, Chongqing 400044, Peoples R China;

    Chongqing Univ, Coll Mat Sci & Engn, Natl Engn Res Ctr Magnesium Alloys, Chongqing 400044, Peoples R China;

    Chongqing Univ, Coll Mat Sci & Engn, Natl Engn Res Ctr Magnesium Alloys, Chongqing 400044, Peoples R China;

    Chongqing Univ, Coll Mat Sci & Engn, Natl Engn Res Ctr Magnesium Alloys, Chongqing 400044, Peoples R China;

    Chongqing Univ, Coll Mat Sci & Engn, Natl Engn Res Ctr Magnesium Alloys, Chongqing 400044, Peoples R China;

    Chongqing Univ, Coll Mat Sci & Engn, Natl Engn Res Ctr Magnesium Alloys, Chongqing 400044, Peoples R China;

    Chongqing Univ, Coll Mat Sci & Engn, Natl Engn Res Ctr Magnesium Alloys, Chongqing 400044, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Mg-Gd-Y-Zn-Mn-(Ag); Long-period stacking ordered (LPSO) phase; gamma ' phase; beta ' phase; Mechanical properties;

    机译：Mg-Gd-Y-Zn-Mn-（Ag）;长周期有序相（LPSO）相;γ′相;β′相;力学性能;

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