| 초록 |
It is known that Al alloy containing hypereutectic amount of Mn exhibits faceted Al6Mn precipitate during solidification. The mechanical property of the alloy strongly depends on the morphology and distribution of the precipitates and dendrite shapes, which are altered by the alloy chemistry and the presence of the external mixing. In order to simulate the microstructural evolution during solidification of this alloy a computational model based on phase field approach is used. Different anisotropy models are compared to demonstrate proper shape of the precipitate. Precipitate size, distribution, dendrite shapes, and elemental distribution under different cooling rate are computed and validated in comparison with micrographs of as-cast Al-Mn alloy which show acceptable agreements in meso-scale level. |
