The anisotropic fatigue behavior of forged steel

Etienne Pessard (1) , Franck Morel (1) , Anne Morel (1)

1 LAMPA - PMD - Laboratoire des Arts et Métiers ParisTech d'Angers - Procédés Matériaux Durabilité

This work deals with the anisotropic fatigue behaviour of the Bainitic Steel Metasco®MC and aims at improving the fatigue criteria used for the design of forged components (suspension arm). This material contains elongated manganese sulphide (MnS) inclusions oriented parallel to the rolling or forging direction. Specimens with different orientations relative to the rolling direction have been tested in fatigue under push-pull uniaxial loads. The influence of "inclusion clusters" is clearly demonstrated via the observation of the fracture surfaces. A fracture mechanics approach together with a statistical approach is proposed to account for the anisotropic fatigue behaviour.

Mots clés: Anisotropy; Forging; High cycle fatigue; Manganese sulfide inclusions

Domaines: Matériaux

Etienne Pessard, Franck Morel, Anne Morel. The anisotropic fatigue behavior of forged steel. Advanced Engineering Materials, 2009, 11 (9), pp.732-735. ⟨10.1002/adem.200900040⟩. ⟨hal-00805154⟩