论文和技术资料

The transformation of austenite (A) to ferrite (F) in steels, which is technologically important and of fundamental interest, still remains less well understood in some aspects. At intermediate undercooling F grows with a plate-like morphology (widmanstätten). Some calculations, which assume that the composition at A/F boundary is local-equilibrium or the morphology of F is rather simple, are just fit for low dimensional simple shape. The phase-field modeling (PFM) which is proposed to simulate complicated microstructure evolutions, is anther powerful method. A PFM with a highly anisotropic interfacial energy is formulated, and the governing equations are solved successfully by the commercial software COMSOL Multiphysics® software through the mode of self-definition partial differential equation. The simulated results have excellent similarity with experimentally observed ones.