Dresden 2011 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 27: Phase Transformations II
MM 27.4: Vortrag
Mittwoch, 16. März 2011, 15:15–15:30, IFW D
Recrystallization of a deformed 3D microstructure studied by macro-micro simulations — •Alexander Vondrous1, Michael Selzer1, Britta Nestler1, Pierre Bienger2, and Simone Schendel3 — 1Institute of Materials and Processes, University of Applied Sciences, Karlsruhe, Germany — 2Fraunhofer Institut for Machanics, Freiburg, Germany — 3Institute for Reliability of Components and Systems KIT, Karlsruhe, Germany
Cold rolling of sheet metal introduces a high amount of dislocations, which lead to significant changes of the material properties. During annealing, to obtain the initial properties, dislocations are reduced by nucleation and growth of the nuclei driven by the stored energy (recrystallization). A dislocation density triggered nucleation of recrystallizing grains is introduced to simulate stored energy driven nuclei growth of cold rolled sheet metal for static recrystallization. The phase-field model incorporating additional equations for the stored energy driving force is introduced. Growth kinematics depend on the crystallographic orientations and the stored energy distribution. The starting point of the microstructure simulation is a macroscopic finite element simulation containing the corresponding deformation texture and accumulated plastic slip. A comparison with experimental measurements is achieved by evaluating the pole figures of the polycrystalline material at different stages of the process. The comparison serves as a validation of the micro-macro approach.