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.
DAN Zhang-Zhi
,
ZHANG Wen-Zheng
. DESIGNING Mg-Sn-Mn ALLOY BASED ON CRYSTALLOGRAPHY OF PHASE TRANSFORMATION[J]. Acta Metall Sin, 2011
, 47(1)
: 41
-46
.
DOI: 10.3724/SP.J.1037.2010.00323
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