Abstract
In this article, the as-cast microstructures and mechanical properties of the Mg–4Y–1.2Mn–0.9Sc and Mg–4Y–1.2Mn–1Zn (wt%) magnesium alloys are investigated and compared. The results indicate that the Sc-containing alloy is mainly composed of α-Mg and fine particle-like Mg24Y5, Mn12Y, and Mn2Sc phases, while the Zn-containing alloy mainly consists of α-Mg and coarse Mg12YZn phases with a continuous network. Furthermore, the grains of the Zn-containing alloy are relatively finer than those of the Sc-containing alloy. In addition, the Sc-containing alloy exhibits relatively higher tensile properties at room temperature and 300 °C than the Zn-containing alloy. However, the creep properties at 300 °C and 30 MPa for 100 h for the Sc-containing alloy are relatively lower than those for the Zn-containing alloy.
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Acknowledgements
The present study was supported by the National Natural Science Funds of China (No. 50725413), the Major State Basic Research Development Program of China (973) (No. 2007CB613704), the Chongqing Science and Technology Commission in China (CSTC, 2010AC4085, 2009AB4134 and 2006AA4012-9-6), the Chongqing Education Commission in China (KJ090628) and the Program for Hundreds of Distinguished Leading Scientists of CQ CSTC (2010CSTC-HDLS).
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Yang, M., Pan, F., Shen, J. et al. Comparison about as-cast microstructures and mechanical properties of Mg–4Y–1.2Mn–0.9Sc and Mg–4Y–1.2Mn–1Zn (wt%) magnesium alloys. J Mater Sci 46, 3094–3100 (2011). https://doi.org/10.1007/s10853-010-5188-7
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DOI: https://doi.org/10.1007/s10853-010-5188-7