Simulation of Microstructure Formation Process in Fe-23Cr-6Ni-3Mo-0.1N Alloy Using Multiphase Field Method

Abstract

The microstructure formation process in duplex stainless steel was simulated using a multiphase field (MPF) method. The dendrite solidification of a primary δ phase and the growth of an acicular γ phase by solid-state transformation were simulated, and the calculation results were found to nearly correspond to those of the experimental microstructure obtained using a liquid-tin quenching method. The MPF method is considered to be highly effective in designing duplex stainless steels and in evaluating the cooling-rate dependence of the microstructure morphology in welding solidification.