ANR DREAM

Projet ANR DREAM - Dynamic REcrystallization in Anisotropic Materials (2014-2018)

The project DREAM was financed by the French National Research Agency (ANR) during the period 2014-2018.

n° ANR-13-BS09-0001-01

The project is now over, you can find the final report here

Contact: maurine.montagnat(at)univ-grenoble-alpes.fr

Participants

– IGE : 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

Publications

B. Journaux, T. Chauve, M. Montagnat, A. Tommasi, F. Barou, D. Mainprice, and L. Gest. Recrystallization processes, microstructure and crystallographic preferred orientation evolution in polycrystalline ice during high-temperature simple shear. The Cryosphere, 13(5):1495–1511, 05 2019. https://doi.org/10.5194/tc-13-1495-2019
T. Chauve, M. Montagnat, S. Piazolo, B. Journaux, J. Wheeler, F. Barou, D. Mainprice and A. Tommasi. 2017. Non-basal dislocations should be accounted for in simulating ice mass flow. EPSL. 473, 247-255, https://doi.org/10.1016/j.epsl.2017.06.020
K. Hidas, A. Tommasi, D. Mainprice, T. Chauve, F. Barou and M. Montagnat. Microstructural evolution 1 during thermal annealing of ice-Ih, 2017. Journal of Structural Geology, Vol 99, 31-44. https://doi.org/10.1016/j.jsg.2017.05.001
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.
T. Chauve, M. Montagnat, F. Barou, K. Hidas, A. Tommasi, D. Mainprice, 2017. Investigation of nucleation processes during dynamic recrystallization of ice using cryo-EBSD. Phil. Trans. R. Soc. A 375: 20150345. http://dx.doi.org/10.1098/rsta.2015.0345
T. Richeton, Incompatibility stresses and lattice rotations due to grain boundary sliding in heterogeneous anisotropic elasticity, Crystals, 7 (2017) 203 (1-14)
T. Chauve, M. Montagnat, C. Lachaud, D. Georges and P. Vacher. Strain heterogeneities at the ductile to brittle transition ; a case study on ice. Solid Earth, 8, 943-953, 2017. https://doi.org/10.5194/se-8-943-2017
F. Schlosser, C. Schwindt, V. Fuster, A. Tommasi, and J. Signorelli, 2017. Crystallographic texture evolution of a zinc sheet subjected to different strain paths. Metallurgical Materials Trans. A, doi:10.1007/s11661-017-4069-y
M. Montagnat, T. Chauve, F. Barou, A. Tommasi, B. Beausir, C. Fressengeas. Analysis of dynamic recrystallization of ice from EBSD orientation mapping. 2015. Frontiers In Earth Sciences. 3:81. https://doi.org/10.3389/feart.2015.00081
S. Piazolo, M. Montagnat, F. Grennerat, H. Moulinec, J. Wheeler. Effect of local stress heterogeneities on dislocation fields: Examples from transient creep in polycrystalline ice. Acta Materialia, 2015, 90, 0, 303-309. https://doi.org/10.1016/j.actamat.2015.02.046

News - Last update September 2020

– The DREAM project opened the way toward a stochastic approach for simulating the effects of recrystallization mechanisms in large scale flow models. This perspective will be concretized in the ERC Advanced
RhEoVOLUTION (2020-2025) held by Andrea Tommasi. Congratulations Andrea!

– The DREAM "team" is happy to announce the creation of the new GDR "Recristallisation et croissance des grains" (2006) for the period 2017-2021.
More information on the GDR site

– The DREAM "team" has been strongly involved in the Thematic School on Recrystallization, November 2016 in Sète (more here)

– The DREAM modeling results were presented at the European Mechanics of Materials Conference, September 2016.

– The DREAM results on ice were presented during an invited talk at the Gordon conference on Rock Deformation, August 2016.

– Annual meeting in Paris 30-31 of Mai 2016.

– The DREAM results were presented at the AGU annual conference in San Francisco, with 4 presentations!

– Annual meeting took place in October 8 and 9, 2015.

– The DREAM results were 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 summer school was financed by the ESF research networking Programme MicroDIce, by CNRS, and organized in the frame of the GDR3436 Recrystallization (2010-2014).

– Annual meeting took place in Grenoble, October 26, 2014.

Aim of the project:

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 team:

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.