| Numéro |
J. Phys. IV France
Volume 11, Numéro PR5, Septembre 2001
5th European Mechanics of Materials Conference on Scale Transitions from Atomistics to Continuum PlasticityEUROMECH-MECAMAT'2001 |
|
|---|---|---|
| Page(s) | Pr5-301 - Pr5-308 | |
| DOI | https://doi.org/10.1051/jp4:2001537 | |
5th European Mechanics of Materials Conference on Scale Transitions from Atomistics to Continuum Plasticity
EUROMECH-MECAMAT'2001
J. Phys. IV France 11 (2001) Pr5-301-Pr5-308
DOI: 10.1051/jp4:2001537
1 CEA, Centre de Valduc, 21120 Is-sur-Tille, France
2 Université de Technologie de Compiègne, Laboratoire Roberval, UMR 6066 du CNRS, BP. 20529, 60205 Compiègne cedex, France
3 École Centrale Paris, Laboratoire MSS-MAT, 92295 Châtenay-Malabry cedex, France
© EDP Sciences 2001
EUROMECH-MECAMAT'2001
J. Phys. IV France 11 (2001) Pr5-301-Pr5-308
DOI: 10.1051/jp4:2001537
A polycrystalline model for stress-strain behaviour of tantalum at 300 K
S. Frénois1, E. Munier1, X. Feaugas2 and P. Pilvin31 CEA, Centre de Valduc, 21120 Is-sur-Tille, France
2 Université de Technologie de Compiègne, Laboratoire Roberval, UMR 6066 du CNRS, BP. 20529, 60205 Compiègne cedex, France
3 École Centrale Paris, Laboratoire MSS-MAT, 92295 Châtenay-Malabry cedex, France
Abstract
A polycrystalline model is proposed to model the large plastic deformation and texture evolutions in tantalum over a wide range of strain rates at room temperature. The mechanical behaviour is discussed in terms of back and effective stresses with the help of qualitative and quantitative TEM observations, Using these observations, an elasto-visco-plastic formulation for b.c.c. crystals is developed in the thermal activation framework.
© EDP Sciences 2001