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Volume 24 Issue 8
Aug.  2017
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文章导航 >  矿物冶金与材料学报（英文）  > 2017  >  24(8): 901-908
Lavish Kumar Singh, Alok Bhadauria, Amirthalingam Srinivasan, Uma Thanu Subramonia Pillai,  and Bellambettu Chandrasekhara Pai, Effects of gadolinium addition on the microstructure and mechanical properties of Mg-9Al alloy, Int. J. Miner. Metall. Mater., 24(2017), No. 8, pp. 901-908. https://doi.org/10.1007/s12613-017-1476-4
Cite this article as:
Lavish Kumar Singh, Alok Bhadauria, Amirthalingam Srinivasan, Uma Thanu Subramonia Pillai,  and Bellambettu Chandrasekhara Pai, Effects of gadolinium addition on the microstructure and mechanical properties of Mg-9Al alloy, Int. J. Miner. Metall. Mater., 24(2017), No. 8, pp. 901-908. https://doi.org/10.1007/s12613-017-1476-4
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研究论文

Effects of gadolinium addition on the microstructure and mechanical properties of Mg-9Al alloy

  • Department of Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India

  • Materials Science and Technology Division, National Institute for Interdisciplinary Science and Technology, Trivandrum 695001, India

  • 通讯作者:

    Uma Thanu Subramonia Pillai    E-mail: utspillai@rediffmail.com

  • This research aims to study the significance of Gd addition (0wt%-2wt%) on the microstructure and mechanical properties of Mg-9Al alloy. The effect of Gd addition on the microstructure was investigated via X-ray diffraction (XRD), optical microscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The Mg-9Al alloy contained two phases, α-Mg and β-Mg17Al12. Alloying with Gd led to the emergence of a new rectangular-shaped phase, Al2Gd. The grain size also decreased marginally upon Gd addition. The ultimate tensile strength and microhardness of Mg-9Al alloy increased by 23% and 19%, respectively, upon 1.5wt% Gd addition. We observed that, although Mg-9Al-2.0Gd alloy exhibited the smallest grain size (181 μm) and the highest dislocation density (5.1×1010 m-2) among the investigated compositions, the Mg-9Al-1.5Gd alloy displayed the best mechanical properties. This anomalous behavior was observed because the Al2Gd phase was uniformly distributed and present in abundance in Mg-9Al-1.5Gd alloy, whereas it was coarsened and asymmetrically conglomerated in Mg-9Al-2.0Gd.
    • Research Article

    Effects of gadolinium addition on the microstructure and mechanical properties of Mg-9Al alloy

    + Author Affiliations
      Abstract
    • This research aims to study the significance of Gd addition (0wt%-2wt%) on the microstructure and mechanical properties of Mg-9Al alloy. The effect of Gd addition on the microstructure was investigated via X-ray diffraction (XRD), optical microscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The Mg-9Al alloy contained two phases, α-Mg and β-Mg17Al12. Alloying with Gd led to the emergence of a new rectangular-shaped phase, Al2Gd. The grain size also decreased marginally upon Gd addition. The ultimate tensile strength and microhardness of Mg-9Al alloy increased by 23% and 19%, respectively, upon 1.5wt% Gd addition. We observed that, although Mg-9Al-2.0Gd alloy exhibited the smallest grain size (181 μm) and the highest dislocation density (5.1×1010 m-2) among the investigated compositions, the Mg-9Al-1.5Gd alloy displayed the best mechanical properties. This anomalous behavior was observed because the Al2Gd phase was uniformly distributed and present in abundance in Mg-9Al-1.5Gd alloy, whereas it was coarsened and asymmetrically conglomerated in Mg-9Al-2.0Gd.
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