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Microstructure Evolution and Mechanical Properties of Long Period Stacking Ordered Mg96Gd3Ni1 Alloy with Al and Sr Additions

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Abstract

The effects of 0.3 at. pct Al and x at. pct Sr (x = 0.0, 0.1, 0.2, 0.3) on the microstructure and mechanical properties of as-cast Mg96Gd3Ni1 alloy were investigated. With addition of 0.3 at. pct Al, new quaternary Mg-Gd-Ni-Al phases with peculiar rod-like and petal-like morphologies are uniformly distributed in the alloy. The angles between petals of the petal-like phase are all about 60 deg. The microstructure of the alloy is refined, leading to fine grain strengthening. The volume fraction of the long-period stacking ordered phase which is excellent reinforcement phase of Mg alloys increases significantly. Moreover, combined addition of 0.3 at. pct Al and 0.1 at. pct Sr refines the microstructure further and enhances the mechanical properties of the alloy simultaneously.

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Acknowledgments

The work is sponsored by the National Natural Science Foundation of China (Nos. 50571073, 51474153 and 51301118), Ph.D. Programs Foundation of Ministry of Education of China (20111402110004) and Natural Science Foundation of Shanxi Province (Nos. 2009011028-3 and 2012011022-1).

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Authors and Affiliations

  1. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, P.R. China

    Dandan Wang (Postgraduate Researcher), Jinshan Zhang (Professor), Kaibo Nie (Lecturer), Xiaofeng Niu (Associate Professor), Zhiyong You (Associate Professor), Chunxiang Xu (Professor) & Hongxia Wang (Professor)

  2. Weichai Heavy Machinery Co., LTD, Weifang, 261001, P.R. China

    Wenbo Zhang (Research Fellow)

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  1. Dandan Wang
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  2. Jinshan Zhang
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  3. Wenbo Zhang
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  4. Kaibo Nie
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  5. Xiaofeng Niu
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  6. Zhiyong You
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  7. Chunxiang Xu
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  8. Hongxia Wang
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Correspondence to Jinshan Zhang.

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Manuscript submitted August 11, 2014.

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Wang, D., Zhang, J., Zhang, W. et al. Microstructure Evolution and Mechanical Properties of Long Period Stacking Ordered Mg96Gd3Ni1 Alloy with Al and Sr Additions. Metall Mater Trans A 46, 2710–2717 (2015). https://doi.org/10.1007/s11661-015-2871-y

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  • DOI: https://doi.org/10.1007/s11661-015-2871-y

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