On the role of particles distribution on damage and fatigue mechanisms

Pierre-Olivier Bouchard (1) , Marc Bernacki (1) , Rachid El Khaoulani (1) , Marc Milesi (1)

1 CEMEF - Centre de Mise en Forme des Matériaux

Damage and fatigue properties of steel grades are often related to particles shape and chemical composition. To understand the role of particles on damage and fatigue mechanisms numerical modelling at the microscale level can be helpful. It is shown here how forging can induce an oriented microstructure (grain flow orientation) that induces anisotropic damage and fatigue behaviour. Then a microstructure builder (DIGIMICRO) is presented to illustrate how it is possible to create a realistic microstructure in an elementary volume. Computations performed within this heterogeneous elementary volume can be used to understand the anisotropy induced by particles shape and orientation.

Mots clés: Damage Mechanics; Fatigue; Microstructure; Particles distribution; Finite Element

Domaines: Sciences de l'ingénieur [physics]; Matériaux

Pierre-Olivier Bouchard, Marc Bernacki, Rachid El Khaoulani, Marc Milesi. On the role of particles distribution on damage and fatigue mechanisms. 12th ESAFORM Conference on Material Forming, Apr 2009, Enschede, Netherlands. pp.Pages 935-938, ⟨10.1007/s12289-009-0615-5⟩. ⟨hal-00509423⟩