Abstract
The influence of the austenitic microstructural morphology on the mechanical response of a multiphase steel is analyzed by comparing two relevant configurations, namely (i) uniformly distributed grains of retained austenite embedded in a ferritic matrix and (ii) a banded morphology of the two phases. The analysis is carried out numerically using a discrete dislocation-transformation model that captures processes occurring at sub-grain length scales connected to nucleation and evolution of individual dislocations and martensitic platelets inside the austenitic grains. The simulations indicate that a microstructure composed of uniformly distributed grains of austenite is optimal in terms of strength since it delays the onset of plastic localization compared with banded microstructures.
Original language | English |
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Article number | 074006 |
Pages (from-to) | 074006-1-074006-13 |
Number of pages | 13 |
Journal | Modelling and Simulation in Materials Science and Engineering |
Volume | 19 |
Issue number | 7 |
DOIs | |
Publication status | Published - Oct-2011 |
Event | 5th International Conference on Multiscale Materials Modeling - , Germany Duration: 4-Oct-2010 → 8-Oct-2010 |
Keywords
- INDUCED PLASTICITY
- RETAINED AUSTENITE
- MICROSTRUCTURE
- STABILITY