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首页> 外文期刊>Journal of Materials Research >Investigations on the microstructure, mechanical, corrosion and wear properties of Mg-9A1-xGd (0, 0.5, 1, and 2 wt%) alloys
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Investigations on the microstructure, mechanical, corrosion and wear properties of Mg-9A1-xGd (0, 0.5, 1, and 2 wt%) alloys

机译：Mg-9A1-xGd（0、0.5、1和2 wt％）合金的组织，力学，腐蚀和磨损性能的研究

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摘要

Magnesium alloys with the lowest structural density exhibit unique applications in the automotive and aerospace fields. Rare earth addition is a promising method to enhance the mechanical properties of the Mg alloys. In the present study, the magnesium-aluminium (Mg-9A1) alloy containing varying wt% of gadolinium (Gd) is synthesized using the casting technique. The microstructure, mechanical, corrosion, and wear properties of the developed Mg-9A1-xGd alloy are evaluated and compared to the base Mg-9A1 alloy. Microstructural investigation shows significant grain refinement and the presence of Al_2Gd in addition to β-Mg_(17)Al_(12) in the Gd-added alloys. Under tensile loads, the developed Mg-9Al-2Gd alloy exhibits enhancements in ultimate and yield strengths. The corrosion resistance of the alloys is found to increase with increasing Gd content and is optimal at 2 wt%. Considering the higher hardness and dispersity of the Al_2Gd phase, Mg-9Al-2Gd has exhibited a higher wear resistance than that of the as-cast Mg-9A1 alloy.
机译：具有最低结构密度的镁合金在汽车和航空航天领域表现出独特的应用。稀土添加是增强Mg合金机械性能的一种有前途的方法。在本研究中，使用铸造技术合成了含有不同重量百分比的lin（Gd）的镁铝（Mg-9A1）合金。对开发的Mg-9A1-xGd合金的微观结构，力学，腐蚀和磨损性能进行了评估，并与基础Mg-9A1合金进行了比较。显微组织研究表明，在添加Gd的合金中，除了β-Mg_（17）Al_（12）以外，还具有明显的晶粒细化和Al_2Gd的存在。在拉伸载荷下，开发的Mg-9Al-2Gd合金在极限强度和屈服强度方面均表现出增强。发现合金的耐蚀性随Gd含量的增加而增加，在2 wt％时最佳。考虑到Al_2Gd相的硬度和分散性较高，Mg-9Al-2Gd的耐磨性高于铸态Mg-9A1合金。

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  • 来源
    《Journal of Materials Research》 |2017年第19期|3732-3743|共12页
  • 作者

    Karuna Ratnakaran Athul; Amirthalingam Srinivasan; Uma Thanu Subramonia Pillai;

  • 作者单位

    Materials Science and Technology Division, National Institute for Interdisciplinary Science and Technology (NIIST), Council of Scientific & Industrial Research, Thiruvananthapuram 695019, India;

    Materials Science and Technology Division, National Institute for Interdisciplinary Science and Technology (NIIST), Council of Scientific & Industrial Research, Thiruvananthapuram 695019, India;

    Materials Science and Technology Division, National Institute for Interdisciplinary Science and Technology (NIIST), Council of Scientific & Industrial Research, Thiruvananthapuram 695019, India;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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