Micromechanical Phase-Field Modeling of Eutectic Growth with Misfit Stresses and Multiple Misorientations

In this paper a micromechanical phase-field model to investigate the formation of eutectic structures in a Ti- Fe alloy with high elastic misfit is introduced. Based on linear microelasticity theory an elastic model is designed to incorporate the elastic energy into the phase-field formalism and later on adopted to growth of multiple nuclei with arbitrary orientations by including the orientation energy in phase-field ansatz. By using this model we investigate the free growth of a limited number of eutectic nuclei and examine the inuence of orientation free energies on elastic fields and the resulting microstructure.

Keywords:

Micromechanical phase-field model , Elastic energy , Misfit stresses , Eutectic growth