Scale bridging simulations of large elastic deformations and bainitic transformations

Abstract

The multiscale process of bainitic microstructure formation is still insufficiently understood from a theoretical and simulation perspective. Production processes of press hardened bainitic steels lead to large deformations, and as a particular aspect we investigate the role of large elastic strains, starting from ab initio methods, bridging them to phase field crystal continuum approaches and connecting the results to macroscopic deformation laws. Our investigations show that the phase field crystal model covers large deformations in the nonlinear elastic regime very well. Concerning the microstructure evolution we use a multi phase field model including carbon diffusion, carbide formation and elastic effects. For all the covered aspects we use efficient numerical schemes, which are implemented on GPUs using CUDA.