|About this Abstract
|MS&T22: Materials Science & Technology
|Multi Scale Modeling of Microstructure Deformation in Material Processing
|Stochastic Model Describing Phase Transformations in Steels Accounting for a Random Character of Nucleation
|Danuta Szeliga, Roman Kuziak, Lukasz Poloczek, Jan Kusiak, Maciej Pietrzyk
|On-Site Speaker (Planned)
An important problem of the heterogeneity of the multiphase microstructure was considered in the paper. The stochastic model of multi-step hot deformation was applied to calculate histograms of the dislocation density and the grain size at the beginning of phase transformations. These histograms were used as input for simulation of phase transformations. Conventional deterministic model of the kinetics of transformations was connected with a stochastic model of nucleation. Heterogeneity of the phase composition was calculated for various constant cooling rates, as well as for the industrial laminar cooling process. The results showing an influence of the heterogeneity of the dislocation density and the grain size on the microstructure heterogeneity in the final product can be considered reliable, because they are based on the material models, which were identified and verified experimentally in earlier publications. The effect of the uncertainty of the boundary conditions is presented in a qualitative manner.