A Multiscale Model Based On Intragranular Microstructure: Influence Of Grain-Scale Substructure On Macroscopic Behaviour Of An IF-Steel During Complex Load Paths

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

1 LPMM - Laboratoire de physique et mécanique des matériaux
2 LEMTA - Laboratoire d'Energétique et Mécanique Théorique et Appliquée
3 ArcelorMittal Maizières Research SA

A microstructural model, based on Peeters' works, is implemented into a large strain self-consistent scheme, leading to the multiscale model which achieves, for each grain, the calculation of slip activity, with help of regularized formulation drawn from the visco-plasticity framework, and the dislocation microstructure evolution. This paper focuses on the relationship between macroscopic hardening/softening effects and induced microstructure during monotonic and two-stage strain paths.

Mots clés: Complex strain paths; Crystal plasticity; Dislocations; Microstructure; crystal plastic...; complex strain ...; crystal microst...; steel; numerical analy...; viscoplasticity

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: Influence Of Grain-Scale Substructure On Macroscopic Behaviour Of An IF-Steel During Complex Load Paths. NUMIFORM 07: Materials Processing and Design: Modeling, Simulation and Applications, Jun 2007, Porto, Portugal. pp.1345-1350, ⟨10.1063/1.2740996⟩. ⟨hal-01206835⟩