The microstructure evolution during a liquid-liquid phase transformation was calculated. The effect of convections on the microstructure development was investigated. The results demonstrate that the convective flow against the solidification direction causes an increase in the local nucleation rate. Convections lead to a more nonuniform distribution of the minority phase droplets (MPDs) in the melt. They cause an increase in the size of the largest MPDs and are against the obtaining of the immiscible alloys with a well dispersed microstructure. (C) 2008 American Institute of Physics.
部门归属
[li, h. l.; zhao, j. z.] chinese acad sci, inst met res, shenyang 110016, peoples r china.;zhao, jz (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china;jzzhao@imr.ac.cn
修改评论