Q. Chen, X. Lu, H. Strandlund, A. Engström, Thermo-Calc Software AB, Stockholm, Sweden
In this presentation we simulate the concurrent process of nucleation, growth, and coarsening of gamma prime particles in several Ni-based alloys by using TC-PRISMA, a computational tool that is integrated with Thermo-Calc and DICTRA, and can use existing thermodynamic and kinetic databases directly. The multi-component Gibbs-Thomson effect and cross diffusion have been treated exactly in our approach. We have calculated the temporal evolutions of the number density, particle size, particle size distribution, and compositions in both matrix and precipitate phases, and compared the calculation results with experimental ones from the literature. A fair agreement has been found, but a few issues and challenges remain and will be discussed.
Summary: In this presentation we simulate the concurrent process of nucleation, growth, and coarsening of gamma prime particles in several Ni-based alloys by using TC-PRISMA, a computational tool that is integrated with Thermo-Calc and DICTRA, and can use existing thermodynamic and kinetic databases directly. The multi-component Gibbs-Thomson effect and cross diffusion have been treated exactly in our approach. We have calculated the temporal evolutions of the number density, particle size, particle size distribution, and compositions in both matrix and precipitate phases, and compared the calculation results with experimental ones from the literature. A fair agreement has been found, but a few issues and challenges remain and will be discussed.
