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H. Buken, E. Kozeschnik:
"Modelling the thermo-mechanical processing of micro-alloyed steel";
Talk: EUROMAT 2017, THESSALONIKI; 2017-09-17 - 2017-09-22.

The final product quality of hot rolled steel is vastly influenced by the austenite grain condition, which is adjusted by thermo-mechanical treatments, where recrystallization and grain growth occur. In the case of micro-alloyed steel, precipitates and solute atoms interact with grain boundary movement. On the one hand, precipitates, which are arranged at the grain boundary, exert a retarding force by removal of grain boundary area and, thus, reduce the velocity of grain boundary migration. On the other hand, solute atoms also decrease the boundary migration velocity, which is known as Solute Drag effect. In this work, we present a physically-based model, which captures these influences and predicts important state parameters of microstructure evolution during hot rolling. The model is compared to a vast amount of experimental studies on this topic where excellent agreement is observed.