A. Engström, H. Strandlund, X. Lu, Q. Chen, Thermo-Calc Software AB, Stockholm, Sweden; P. Mason, Thermo-Calc Software Inc, McMurray, PA
A new software tool, TC-PRISMA, for simulation of precipitation reactions in multicomponent alloys has been developed. Based on accurate models for nucleation, growth and coarsening, simulations of heat treatment may be performed under realistic conditions and a large number of different quantities may be calculated.
The nucleation models implemented into this new software accounts for heterogeneous nucleation and several different types of nucleation sites are considered. The models used for calculation of particle growth rate take the effect of finite interface mobility into account and growth under ortho- as well para-equilibrium may be considered. To ensure high predictive capabilities thermodynamic, kinetic and property databases assessed by the CALPHAD method are used for calculating diffusivities and surface energies.
In this presentation it will be shown how TC-PRISMA can be applied for calculating average quantities, particle size distributions and transformation diagrams in steels during industrial heat treatment.
Summary: A new software tool, TC-PRISMA, for simulation of precipitation reactions in multicomponent alloys will be presented. This new software tool is based on accurate models for nucleation, growth and coarsening, and will allow simulations of complex industrial heat treatments to be performed under realistic conditions.
