par- 19 mai 2014 - ( maj : 29 juin 2015 )
The project DREAM is financed by the French National Research Agency (ANR) during the period 2014-2018.
Contact : montagnat(at)lgge.obs.ujf-grenoble.fr
LGGE : Maurine Montagnat (P.I.), Thomas Chauve (PhD), Baptiste Journaux (Post-doc), Laurent Arnaud, Olivier Alemany
Géosciences Montpellier : Andrea Tommasi, David Mainprice, Fabrice Barou, Hidas Karoly (Post-doc)
LEM3 : Thiebaud Richeton, Tuan Lu LE (post-doc), Claude Fressengeas, Stéphane Berbenni, Mikhail Lebedkin
CEMEF : Marc Bernacki
EPSL : Roland Logé
ILL : Bachir Ouladdiaf
ISTerre : Jérôme Weiss
The next annual meeting will take place October 8 and 9, 2015.
The DREAM results where presented at the international conference CREEP 2015 in Toulouse, early June 2015, with two talks, and one invited talk (T. Chauve et al., K. Hidas et al., M. Montagnat et al.)
The DREAM team has been highly active during the first Summer School on Recrystallization with one member as the main organizer, 4 members as speakers, and 5 members as participants.
The annual meeting took place in Grenoble, October 26, 2014.
Knowledge of the evolution of microstructure (grains size and shape) and texture (or crystal preferred orientations) during deformation, recrystallization, and phase transformations is fundamental in both Material and Earth Sciences, since physical properties of crystalline materials like rocks, ice, metals, ceramics, and even some polymers and organic compounds, are strongly dependent on the orientation of their constitutive crystals. Texturing of crystalline materials leads to anisotropic physical properties. The main objective of this project is to unravel the links between heterogeneities in dislocation and internal stress fields, stored energy, and nucleation mechanisms during DRX. This knowledge is essential to implement DRX processes in numerical modeling approaches of varying degrees of complexity. A second objective is to provide mechanically-based kinetic laws for grain boundary motion in DRX, based on the elastic/plastic compatibility conditions at interfaces required from a continuum approach of surfaces of discontinuity in elasto-plastic materials.
The project DREAM gathers scientists with strong competencies and knowledges in different fields of material sciences. The final objectives and applications are multi-disciplinary, but all partners share a common interest for the fundamental processes controlling dynamic recrystallization. LGGE and Géosciences Montpellier have a strong experience in experimental development, ranging from mechanical test to EBSD. The modeling competencies, from physical-based model conception, numerical development and validation, are gathered at LEM3 and CEMEF in a complementary way.
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