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DESIGNING Mg-Sn-Mn ALLOY BASED ON CRYSTALLOGRAPHY OF PHASE TRANSFORMATION |
SHI Zhangzhi, ZHANG Wenzheng |
Key Laboratory of Advanced Materials of Ministry of Education, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084 |
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Cite this article:
SHI Zhangzhi ZHANG Wenzheng. DESIGNING Mg-Sn-Mn ALLOY BASED ON CRYSTALLOGRAPHY OF PHASE TRANSFORMATION. Acta Metall Sin, 2011, 47(1): 41-46.
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Abstract Crystallography of phase transformation is used as the main principal to guide Mg-Sn-X alloy design. Based on a comprehensive literature survey, two criteria of crystallography of phase transformation are given to select the precipitate probably growing along [0001]α direction of Mg matrix. Combined with available data of phase diagram, we deduce that β-Mn in Mg-Sn-Mn system is a hopeful candidate. TEM study on the specimen of Mg-7.5Sn-2.2Mn (mass fraction, %) alloy confirms that rod-like β-Mn precipitates grow along [0001]α, and their orientation relationship (OR) with Mg matrix is [0001]α///[211]β-Mn, [0110]α///[011]β-Mn, [2110]α//[111]β-Mn.
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Received: 02 July 2010
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Fund: Supported by National Basic Research Program of China (No.2007CB613704) |
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