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Microstructure and mechanical properties of Mg–5Li–3Al–2Zn–xRE alloys

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Abstract

Mg–5Li–3Al–2Zn–xRE alloys were prepared. The microstructure and mechanical properties of as-cast and wrought specimens were studied. RE elements in Mg–5Li–3Al–2Zn alloy cause the microstructure refinement and the formation of Al3La, which bring about the improvement of mechanical properties of alloys. The optimal RE content for Mg–5Li–3Al–2Zn alloy is 2 wt%, which makes the microstructure the finest and the mechanical properties the best. The further increase of RE content makes the microstructure be coarsened and the morphology of Al3La change from particular to rod-like and pearlite-like eutectic shape, leading to the poor mechanical properties of alloys.

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Acknowledgements

This study was supported by the National Hi-Tech Research Development Program of China (Project 2006AA03Z511) and also supported by the project of Harbin Science and Technology (Project 2007RFQXG032) innovative talents.

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Authors and Affiliations

  1. Key Laboratory of Superlight Materials & Surface Technology, College of Materials Science & Chemical Engineering, Harbin Engineering University, Ministry of Education, 145 Nantong St, Harbin, 150001, People’s Republic of China

    R. Z. Wu & M. L. Zhang

  2. College of Material Science and Engineering, Fuzhou University, Fuzhou, 350108, People’s Republic of China

    Y. S. Deng

Authors
  1. R. Z. Wu
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  2. Y. S. Deng
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  3. M. L. Zhang
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Correspondence to R. Z. Wu.

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Wu, R.Z., Deng, Y.S. & Zhang, M.L. Microstructure and mechanical properties of Mg–5Li–3Al–2Zn–xRE alloys. J Mater Sci 44, 4132–4139 (2009). https://doi.org/10.1007/s10853-009-3605-6

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  • DOI: https://doi.org/10.1007/s10853-009-3605-6

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