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首页> 外文期刊>Materials Science and Engineering >Effect of Gd content on microstructure and mechanical properties of Mg-Gd-Y-Zr alloys under peak-aged condition
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Effect of Gd content on microstructure and mechanical properties of Mg-Gd-Y-Zr alloys under peak-aged condition

机译：Gd含量对峰值时效条件下Mg-Gd-Y-Zr合金组织和力学性能的影响

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摘要

The current study investigates the effects of different Gd contents (3-12 wt%) on the microstructure, age hardening response and mechanical properties of the Mg-xGd-3Y-0.5Zr alloys. The age hardening response of the alloy increased with increasing Gd content, and tensile strength of the alloy improved with addition of Gd up to 10 wt%. The Mg-10Gd-3Y-0.5Zr alloy exhibited the maximum yield strength of 245 MPa and ultimate tensile strength of 390 MPa. The significant improvements observed in age hardening response and tensile strength were attributed to the dense β' plate-shape particles formed on the prismatic planes of the α-Mg matrix and cuboid-shaped Mg_5(Gd,Y) particles. However, with further increase of the Gd content to 12 wt%, the size and volume fraction of the cuboid-shaped Mg_5(Gd,Y) precipitates increased and these large and brittle precipitates, which may act as crack initiators, deteriorated the ductility of the alloy.
机译：当前的研究调查了不同的Gd含量（3-12 wt％）对Mg-xGd-3Y-0.5Zr合金的显微组织，时效硬化响应和力学性能的影响。合金的时效硬化响应随着Gd含量的增加而增加，合金的拉伸强度随着Gd含量的增加而提高，达到10 wt％。 Mg-10Gd-3Y-0.5Zr合金的最大屈服强度为245 MPa，极限抗拉强度为390 MPa。在时效硬化响应和拉伸强度方面观察到的显着改善归因于在α-Mg基质的棱柱面上形成的致密β'板状颗粒和长方体形状的Mg_5（Gd，Y）颗粒。但是，随着Gd含量进一步增加至12 wt％，长方体形Mg_5（Gd，Y）沉淀物的尺寸和体积分数增加，这些大而脆的沉淀物（可能充当裂纹引发剂）使合金的延展性恶化。合金。

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  • 来源
    《Materials Science and Engineering》 |2014年第6期|79-86|共8页
  • 作者

    H.R. Jafari Nodooshan; Wencai Liu; Guohua Wu; You Rao; Chenxu Zhou; Shipeng He; Wenjiang Ding; R. Mahmudi;

  • 作者单位

    National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, Shanghai 200240, China,Key State Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China;

    National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, Shanghai 200240, China,Key State Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China,Shanghai Light Alloy Net Forming National Engineering Research Center Co., Ltd., Shanghai 201615, China;

    National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, Shanghai 200240, China,Key State Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China;

    National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, Shanghai 200240, China,Key State Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China;

    National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, Shanghai 200240, China,Key State Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China;

    National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, Shanghai 200240, China,Key State Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China;

    National Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, Shanghai 200240, China,Key State Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China;

    School of Metallurgical and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    Mg-Gd-Y-Zr alloy; Microstructure; Precipitation hardening; Tensile properties;

    机译：Mg-Gd-Y-Zr合金;微观结构沉淀硬化;拉伸性能;

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