Abstract
Abstract In the present work, we employ a CALPHAD-integrated physics-based quantitative multi-phase field model to study the microstructure evolution in a multi-phase Ti-alloy. In this model we use the free energies obtained from TTTI3 thermodynamic database for Ti-based alloys using a CALPHAD approach. For numerical implementation of the model, we solve the governing equations in their weak form using the open-source MOOSE finite element framework. Our model is successfully able to capture all the possible orientational variants in Ti- alloy system. Moreover, we elucidate the complex interaction between the variants using two- and multi-particle simulations. We show that the elastic energies associated with the variants play significant role in their growth behavior. We also explore the effect of anisotropy in interfacial energy on the variant evolution.
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