Год выпуска: 2012 Автор: Nima Yazdipour and Peter D. Hodgson Издательство: LAP Lambert Academic Publishing Страниц: 312 ISBN: 9783847372844
Описание
Microstructure evolution during and following hot deformation was modeled using Cellular Automata (CA) technique. Dislocation annihilation during and following hot deformation, dynamic static and meta-dynamic (DRX, SRX and MDRX respectively), are considered using a 2D CA approach. The dislocation density was employed as the governing parameter to simulate the softening fraction. Kocks-Mecking approach was used to derive the dynamic recovery (DRV) curves. The flow curves, softening kinetics and final microstructures were modelled for different thermomechanical conditions (i.e. different Zener-Hollomon parameters, Z) and used as the input data for the post-deformation softening simulation to elucidate the effect of DRX on the post-deformation softening. The simulation results were compared with the experimental data from the hot torsion test of AISI 304 steel. The proposed model used a wide range of Zener-Hollomon parameter (Z) and predicted the final microstructure and softening...
