[Zurück]

H. Buken, J. Svoboda, E. Kozeschnik:
"A Multi-class Approach for the Description of Static and Dynamic Recrystallization in Steel";
Vortrag: 6th International Conference on Recrystallization and Grain Growth, Pittsburgh; 17.07.2016 - 21.07.2016.

In the processing of low-alloyed steel, complex thermo-mechanical
treatments
with several steps are commonly carried out at different temperatures and
deformation conditions. In the course of processing, usually, dynamic
and/or
static recrystallization phenomena are observed. If continued deformation
affects already recrystallized grains, the so-called dynamic
recrystallization
process occurs in waves of varying amplitude and frequency. To reflect this

behaviour, we formulate a state parameter-based multi-class
recrystallization
model, which describes the microstructure evolution by means of different
grain
sizes, dislocation densities and sub grain sizes in each class. The
presented
model is verified against experiments on static and dynamic
recrystallization
from literature, where excellent agreement is achieved.