Phase field simulation of the interface morphology evolution and its stability during directional solidification of binary alloys |
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Authors: | JinCheng Wang JunJie Li YuJuan Yang YuXiang Zhang and GenCang Yang |
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Affiliation: | (1) State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an, 710072, China |
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Abstract: | The influences of pulling speed V and temperature gradient G on morphology evolution, concentration distribution, solute trapping and interface stability during directional solidification
of binary alloys have been studied with the B-S phase field model. Simulated results reproduced the morphology transitions
of deep cell to shallow cell and shallow cell to plane front. The primary cellular spacing, depth of groove and effective
solute redistribution coefficient for different V and G are compared. The absolute stability under high pulling speed and high temperature gradient has also been predicted, which
is in agreement with the Mullins-Sekerka (M-S) stability theory.
Supported by the National Natural Science Foundation of China (Grant No. 50401013) |
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Keywords: | directional solidification phase field method morphology evolution stability |
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