Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

Micromechanical model of the high temperature cyclic behavior of 9-12%Cr martensitic steels

Abstract : 9-12%Cr quenched and tempered martensitic steels are known to soften under cyclic loadings at high temperature. The present article proposes a model based on physical mechanisms described at the scale of slip systems. This model describes explicitly the microstructural recovery (corresponding to a decrease of the dislocation density and subgrain coarsening) observed experimentally. The scale transition is carried out in the framework of self-consistent homogenization schemes. The model assumptions and its physical basis are explicitly discussed. The parameters are identified on a very limited amount of experimental data. The model turns out to give very good predictions and extrapolations for the cyclic softening effect observed in uniaxial tension-compression loadings for strain ranges larger than 0.3%. Stress-relaxation and creep behavior can also be simulated for high stresses. In addition the cyclic softening effect is reproduced for multiaxial tension-torsion loadings.
Type de document :
Article dans une revue
Liste complète des métadonnées

https://hal-mines-paristech.archives-ouvertes.fr/hal-00624113
Contributeur : Bibliothèque Umr7633 <>
Soumis le : jeudi 15 septembre 2011 - 17:23:57
Dernière modification le : jeudi 24 septembre 2020 - 18:30:04

Identifiants

Citation

Benjamin Fournier, Maxime Sauzay, André Pineau. Micromechanical model of the high temperature cyclic behavior of 9-12%Cr martensitic steels. International Journal of Plasticity, Elsevier, 2011, 27, pp.1803-1816. ⟨10.1016/j.ijplas.2011.05.007⟩. ⟨hal-00624113⟩

Partager

Métriques

Consultations de la notice

258