A multiscale model based on intragranular microstructure - Prediction of dislocation patterns at the microscopic scale

Gérald Franz (1) , Farid Abed-Meraim (1) , Tarak Ben Zineb (2) , Xavier Lemoine (3) , Marcel Berveiller (1)

1 LEM3 - Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux
2 LEMTA - Laboratoire d'Energétique et Mécanique Théorique et Appliquée
3 ArcelorMittal Maizières Research SA

A large strain elastic-plastic single crystal constitutive law, based on dislocation annihilation and storage, is implemented in a new self-consistent scheme, leading to a multiscale model which achieves, for each grain, the calculation of plastic slip activity, with help of regularized formulation drawn from visco-plasticity, and dislocation microstructure evolution. This paper focuses on the relationship between the deformation history of a BCC grain and induced microstructure during monotonic and two-stage strain paths.

Mots clés: Complex strain paths; Crystal plasticity; Dislocations; Microstructure

Domaines: Génie des procédés; Matériaux; Mécanique [physics.med-ph]; Génie mécanique [physics.class-ph]; Matériaux et structures en mécanique [physics.class-ph]; Mécanique des matériaux [physics.class-ph]; Mécanique des solides [physics.class-ph]; Mécanique des structures [physics.class-ph]; Micro et nanotechnologies/Microélectronique

Gérald Franz, Farid Abed-Meraim, Tarak Ben Zineb, Xavier Lemoine, Marcel Berveiller. A multiscale model based on intragranular microstructure - Prediction of dislocation patterns at the microscopic scale. AIP Conference Proceedings, 2007, 907, pp.47-52. ⟨10.1063/1.2729486⟩. ⟨hal-01240824⟩