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| MICROSCOPIC PHASE-FIELD SIMULATION OF COARSENING BEHAVIOR OF PRECIPITATE OF Ni75AlxV25-x ALLOY |
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Cite this article:
. MICROSCOPIC PHASE-FIELD SIMULATION OF COARSENING BEHAVIOR OF PRECIPITATE OF Ni75AlxV25-x ALLOY. Acta Metall Sin, 2006, 42(3): 239-244 .
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Abstract Based on the microelasticity theory of coherent strain and the microscopic phase-field dynamic model, the morphology evolution and the coarsening behavior of Ni75AlxV25-x alloy during precipitation was simulated. The precipitates particles have the obvious orientation for the two phases when the coarsening happened. The [100] directions of phases are the preference orientation during the growth, and aligned along the <001> directions. The growth and coarsening of the first precipitates have two evident stage，but growth and coarsening of the last precipitates are proceeding simultaneously. The growth and coarsening of precipitates are take place by means of the coalescence between neighboring particles. In despite of the precipitation order and the volume fraction are different for different concentration, the morphology of two phases is almost same at last, which has the quadrate shape, and the orientation relationship of (001) //{100} is exist between two phases.
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Received: 21 June 2005
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