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Microstructure and Mechanical Properties of an Extruded Mg-1.58Zn-0.52Gd Alloy

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Magnesium Technology 2017

Part of the book series: The Minerals, Metals & Materials Series ((MMMS))

Abstract

Mg-1.58Zn-0.52Gd (wt%) alloy was indirectly extruded at different temperatures and the resulting microstructure , texture and mechanical properties were investigated. The alloy extruded at 350 °C exhibited a typical bimodal microstructure, consisting of fine dynamically recrystallized (DRXed) grains of ~3.1 μm and coarse unDRXed grains elongated along the ED with many fine spherical Mg3Zn3Gd2 phase, and a strong \( \left[ {10\bar{1}0} \right] \) fiber texture, thereby resulting in high yield strength of 283 MPa and low elongation of 10.0%. With increasing extrusion temperature, the yield strength gradually decreased mainly due to increased DRXed grain size from the Hall-Petch relation, and the elongation increased due to the weakened extrusion texture and increased DRX fraction, suppressing crack initiation at twins in coarse unDRXed grains. As a result, the alloy extruded at 400 °C showed yield strength of 161 MPa and elongation of 24.7%.

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Acknowledgements

The authors gratefully acknowledge the financial supports from the State Key Program of National Natural Science of China (No. 51531002), National Natural Science Foundation of China (NSFC, No. 51601193 and 51301173), National Key Research and Development Program of China (No. 2016YFB0301104), National Basic Research Program of China (973 Program, No. 2013CB632202), JST, Advanced Low Carbon Technology Research and Development Program (ALCA, No. 12102886) and JSPS, Grant-in-Aid for Young Scientists (B) (No. 16K18266).

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Authors and Affiliations

  1. The Group of Magnesium Alloys and Their Applications, Institute of Metal Research, Chinese Academy of Sciences, 62 Wencui Road, Shenyang, 110016, China

    M. G. Jiang & H. Yan

  2. University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing, 100049, China

    M. G. Jiang

  3. School of Chemical Engineering and Technology, Xi’an Jiaotong University, 28 Xianning West Road, Xi’an, 710049, China

    J. C. Chen

  4. Department of Mechanical Engineering, Nagaoka University of Technology, Nagaoka, 940-2188, Japan

    C. Xu, T. Nakata & S. Kamado

Authors
  1. M. G. Jiang
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  2. J. C. Chen
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  3. H. Yan
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  4. C. Xu
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  5. T. Nakata
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  6. S. Kamado
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Corresponding author

Correspondence to M. G. Jiang .

Editor information

Editors and Affiliations

  1. Arizona State University , Tempe, Arizona, USA

    Kiran N. Solanki

  2. Lund University , Lund, Skåne Län, Sweden

    Dmytro Orlov

  3. Structural Materials Unit, National Inst for Materials Sci Structural Materials Unit, Tsukuba, Ibaraki, Japan

    Alok Singh

  4. IND LLC , South Jordan, Utah, USA

    Neale R. Neelameggham

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© 2017 The Minerals, Metals & Materials Society

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Jiang, M.G., Chen, J.C., Yan, H., Xu, C., Nakata, T., Kamado, S. (2017). Microstructure and Mechanical Properties of an Extruded Mg-1.58Zn-0.52Gd Alloy. In: Solanki, K., Orlov, D., Singh, A., Neelameggham, N. (eds) Magnesium Technology 2017. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-52392-7_43

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