National collaborative projects
Other projectsDREAM
Dynamic recrystallization, a key mechanism for the deformation of metals, rocks, and ice
Dynamic recrystallization is a key mechanism during hot deformation of crystalline materials. It induces a restructuring at small scales (micron), that strongly impacts the mechanical response of materials. It influences metal forming processes, flow of ice sheets and plate tectonics.
Although studied for a long time, the diversity of scales and kinetics of the physical processes at play still hinders the development of general dynamic recrystallization models. The DREAM project associated experimental measurements with innovative models to study two model-materials : ice and magnesium. It produced an accurate description of the fundamental mechanisms and the evaluation of the feedback between recrystallization and strain heterogeneities, leading to the development of a modeling approach with a tailored level of complexity. These results will lead to a better representation of the effects of dynamic recrystallization in large-scale modeling.
ANR programme: Blanc 2013
Edition, project duration: 2013 – 48 months
ANR grant: € 413,911
Coordinator:
Maurine Montagnat Rentier
Institut des géosciences de l’environnement
maurine.montagnat@univ-grenoble-alpes.fr
http://www.ige-grenoble.fr/ANR-DREAM-297
Project region: Auvergne-Rhône-Alpes
Main publication or contribution:
- Chauve T, Montagnat M, Barou F, Hidas K, Tommasi A, Mainprice D. 2017 Investigation of nucleation processes during dynamic recrystallization of ice using cryo-EBSD. Phil. Trans. R. Soc. A 375: 20150345.
- T. Richeton, L.T. Le, T. Chauve, M. Bernacki, S. Berbenni and M. Montagnat. Modelling the transport of geometrically necessary dislocations on slip systems: application to single-and multi-crystals of ice. 2017. Modelling Simul. Mater. Sci. Eng. 25, 025010.
Partners:
- Géosciences Montpellier GM, CNRS – Université Montpellier.
- Laboratoire d’Étude des Microstructures et de Mécanique des Matériaux LEM3, CNRS – Université de Lorraine.
- Centre de Mise En Forme des Matériaux CEMEF, CNRS – Mines ParisTech.
The cross-disciplinary research of DREAM opened the way toward a stochastic approach for simulating the effects of recrystallization mechanisms in largescale flow models. This perspective will be concretised in the ERC Advanced Grant RhEoVOLUTION (2020-2025).