| Effects of gadolinium addition on the microstructure and mechanical properties of Mg-9Al alloy |
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| 引用本文： | Lavish Kumar Singh,Alok Bhadauria,Amirthalingam Srinivasan,Uma Thanu Subramonia Pillai,Bellambettu Chandrasekhara Pai. Effects of gadolinium addition on the microstructure and mechanical properties of Mg-9Al alloy[J]. 矿物冶金与材料学报, 2017, 24(8): 901-908. DOI: 10.1007/s12613-017-1476-4 |
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| 作者姓名： | Lavish Kumar Singh Alok Bhadauria Amirthalingam Srinivasan Uma Thanu Subramonia Pillai Bellambettu Chandrasekhara Pai |
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| 作者单位： | Department of Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India |
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| 基金项目： | The authors sincerely acknowledge the financial support of the Council of Scientific and Industrial Research and Ministry of Human Resource Development, Government of India, and the access to the facilities of Central Research Facility, Indian Institute of Technology Kharagpur |
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| 摘 要： | 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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| 关 键 词： | magnesium rare earth alloying gadolinium microstructure mechanical properties |
Effects of gadolinium addition on the microstructure and mechanical properties of Mg–9Al alloy |
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| Lavish Kumar Singh,Alok Bhadauria,Amirthalingam Srinivasan,Uma Thanu Subramonia Pillai,Bellambettu Chandrasekhara Pai. Effects of gadolinium addition on the microstructure and mechanical properties of Mg–9Al alloy[J]. International Journal of Minerals,Metallurgy and Materials, 2017, 24(8): 901-908. DOI: 10.1007/s12613-017-1476-4 |
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| Authors: | Lavish Kumar Singh Alok Bhadauria Amirthalingam Srinivasan Uma Thanu Subramonia Pillai Bellambettu Chandrasekhara Pai |
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| Affiliation: | 1. Department of Metalurgical 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;2. Department of Metalurgical and Materials Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India;3. Materials Science and Technology Division, National Institute for Interdisciplinary Science and Technology, Trivandrum 695001, India |
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| 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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| Keywords: | magnesium rare earth alloying gadolinium microstructure mechanical properties |
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