Computational investigations on the microstructure formation in multi-component alloy systems based on the phase field method

On the basis of the phase field method, the microstructure formation due to the phase decomposition is computationally evaluated for the multi-component alloy systems of Fe-Al-Co and In-GaAsP by using the thermodynamic data related of the systems. The composition dependence of atomic interchange energy is taken into account. The elasticity and mobility of atoms are assumed to depend on the local order parameters such as composition, degree of order and so on. The time-dependent morphological changes of the microstructure are demonstrated for the formation of modulated structure by spinodal decomposition, strain induced morphological changes of precipitates, the order-disorder phase transition and so on.