Abstract
During directional solidification, the competitive dendritic growth between various oriented grains is a key factor to obtain desirable texture. In order to understand the mechanism of competitive dendritic growth, the phase field method was adopted to simulate the microstructure evolution of bicrystal samples. The simulation has well reproduced the whole competitive growth process for both diverging and converging dendrites. In converging case, besides the block of the unfavorably oriented dendrite by the favorably oriented one, the unfavorably oriented dendrite is also able to overgrow the favorable one under the condition of relatively low pulling velocity. This unusual overgrowth is dictated by the solute interaction of the converging dendrite tips. In diverging case, it was found that the grain boundary can be either inclined or parallel to the favorably oriented grain depending on the disposition of two grains.
| Original language | English |
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| Article number | 012098 |
| Journal | IOP Conference Series: Materials Science and Engineering |
| Volume | 33 |
| Issue number | 1 |
| DOIs | |
| State | Published - 2012 |
| Event | 13th International Conference on Modeling of Casting, Welding and Advanced Solidification Processes, MCWASP 2012 - Schladming, Austria Duration: 17 Jun 2012 → 22 Jun 2012 |