DIFFUSIONAL SOLIDIFICATION BEHAVIOR IN 304-STAINLESS-STEEL

To understand the solidification behavior of the 304 stainless steel a nd compare it with experimental observation, DICTRA simulations were t ried along with complete equilibrium solidification and Scheil solidif ication. The amount of delta-ferrite phase was calculated versus tempe rature and the solute concentration was explored along the distance in each phase. Several cooling rates and different interface morphology were used. As a result, solute concentrations calculated at the interf ace seemed to be in good agreement with experimental measurements. The amount of delta-ferrite phase obtained through the diffusional solidi fication was larger than that of equilibrium solidification and experi mental data. The difference between simulated and experimental results will be reduced if more refined and careful experimental measurements are tried and the kinetic assessment which modifies the mobility data base is performed.