Abstract
Micromechanical analysis models for two cases of solidification phenomena are proposed in order to determine the heat exchange between the particles and the base metals. This study is two-dimensional analysis of both spherical particles and cylindrical particles in an hexagonal close-packed array. In an attempt to understand the experimentally observed solidification microstructure in metal-matrix composites, the influence of SiC p on the solidification of aluminum alloy has been studied numerically. This study simplified the actual process as a two-dimensional heat-transfer model to analyze the solidification phenomenon of particle distributed MMCs and predicted the cooling rate, the variations of the solidification fronts and the thermal strain with the calculating temperature distribution. The solidification velocity was compared with the theoretical predictions of settling due to the density difference between the particles and the matrix.
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