Online Lecture by prof. Jurij Sidor

Investigation of recrystallisation phenomena in metals by numerical approximations and experimental evidences

Speaker: prof. Jurij Sidor,  Savaria Institute of Technology, Faculty of Informatics, Eötvös Loránd University.

Title:
Investigation of recrystallisation phenomena in metals by numerical approximations and experimental evidence

Abstract:
To examine the phenomena involved in recrystallization, detailed information on the evolution of deformed structure is required.

This work analyses the development of dislocations during cold rolling and the kinetics of recrystallization. The relationship between the deformation and annealed states is studied by means of orientation imaging microscopy, indentation techniques and numerical approaches.

To quantify the dislocation density in the deformed material as well as the release of stored energy during annealing, a range of methods such as microindentation, X-ray diffraction line profile analysis and electron backscattering diffraction were employed.

The experimental methods allowed both tracing the sub-structural aspect of microstructure evolution and assessing the kinetics of recrystallization. It was shown that the experimentally observed development of dislocation density can be reproduced by numerical approximation.

Both experimental evidence and results of simulations related to substructure evolution enabled the determination of basic parameters (driving force of recrystallization, nucleation rate, etc.), which are necessary for the simulation of kinetics of recrystallization.

This session was chaired by prof. Leo Kestens (Ghent University).