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Effects of samarium on microstructure and mechanical properties of Mg–Y–Sm–Zr alloys during thermo-mechanical treatments

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Abstract

Microstructure and mechanical properties of Mg–4Y–xSm–0.5Zr (x = 1, 4, 8) alloys during thermo-mechanical treatments were investigated in this study. Mg–4Y–4Sm–0.5Zr alloy exhibits higher tensile strength but lower elongation than Mg–4Y–1Sm–0.5Zr alloy during the thermo-mechanical treatments. Large amount of intermetallic phases still remained at grain boundaries in Mg–4Y–8Sm–0.5Zr alloy after solution. These undissolved phases can strengthen the grain boundaries at temperatures higher than 573 K. But the room temperature mechanical properties of Mg–4Y–8Sm–0.5Zr alloy during the thermo-mechanical treatments were greatly weakened for the brittleness of these undissolved intermetallic phases.

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Acknowledgements

This work was supported by International Cooperation Fond of Shanghai Science and Technology Committee, Shanghai/Rhone-Alpes Science and Technology cooperation fund (No. 06SR07104).

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Authors and Affiliations

  1. National Engineering Research Center for Nonferrous Metals Compositions, General Research Institute for Nonferrous Metals (GRINM), No. 2 Xinjiekou Wai Street, 100088, Beijing, People’s Republic of China

    Daquan Li

  2. National Engineering Research Center of Light Alloys Net Forming, School of Materials Science and Engineering, Shanghai Jiaotong University, 800 Dongchuan Road, 200240, Shanghai, People’s Republic of China

    Daquan Li, Qudong Wang & Wenjiang Ding

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  1. Daquan Li
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  2. Qudong Wang
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  3. Wenjiang Ding
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Correspondence to Daquan Li.

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Li, D., Wang, Q. & Ding, W. Effects of samarium on microstructure and mechanical properties of Mg–Y–Sm–Zr alloys during thermo-mechanical treatments. J Mater Sci 44, 3049–3056 (2009). https://doi.org/10.1007/s10853-009-3403-1

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  • DOI: https://doi.org/10.1007/s10853-009-3403-1

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