Simulation of the Evolutions in Real Microstructure of Material under Thermal Cycle with High Thermal Gradients

摘要

The microstructure evolution induced in the workpiece during a manufacturing process influences the functionality of the final product. Therefore, there is a high interest for prediction of the induced microstructure evolution in surface and sub-surface layers of the workpiece. Up to the present day, determination of the final state of microstructure is mostly based on the personal experience obtained from numerous experiments. The microstructure evolution simulation is an alternative to the old trial and error approaches. The recent developments in the computational capacity lead to considerable advances in the material simulation science. In the previous years the authors of this work used the phase field approach for modeling of the microstructure evolution in a steel workpiece under thermal cycle with high temperature gradients. As follow up to the previous works, the presented model is modified to be adjustable for real microstructure of material as well as considerably higher temperature gradients. This model can further be used for modeling of the microstructure evolution during processes with main thermal impact. To evaluate the phase field model, the results of simulations were compared with the experimental data.