Abstract
In this work, a growth analysis is made on the banded microstructure formation during directional solidification of peritectic alloys. The convection model, which has been proposed to explain the discrete banded microstructure formation, is extended in the part of the nucleation condition. Applying the nucleation and constitutional undercooling criterion, a new calculation was developed. Concentration profile calculated by the model was compared with experimentally obtained banded microstructure in Fe-Co and also with those of the convection and the diffusion models. Consistent agreement with experiments is shown. In comparison with the other models, interesting difference in predictions of concentration profile is obtained between them.
