Phase-field Model for Diffusional Phase Transformations in Elastically Inhomogeneous Polycrystals
A phase-field model is described for predicting the diffusional phase transformation process in elastically inhomogeneous polycrystals. The elastic interactions are incorporated by solving the mechanical equilibrium equation using the Fourier-spectral iterative-perturbation scheme taking into account elastic modulus inhomogeneity. A number of examples are presented, including grain boundary segregation, precipitation of second-phase particles in a polycrystal, and interaction between segregation at a grain boundary and coherent precipitates inside grains. It is shown that the local pressure distribution due to coherent precipitates leads to highly inhomogeneous solute distribution along grain boundaries.
Yves Bréchet, Emmanuel Clouet, Alexis Deschamps, Alphonse Finel and Frédéric Soisson
T. W. Heo et al., "Phase-field Model for Diffusional Phase Transformations in Elastically Inhomogeneous Polycrystals", Solid State Phenomena, Vols. 172-174, pp. 1084-1089, 2011