Skip to Main content Skip to Navigation
Journal articles

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.
Document type :
Journal articles
Complete list of metadata

https://hal-mines-paristech.archives-ouvertes.fr/hal-00624113
Contributor : Bibliothèque Umr7633 <>
Submitted on : Thursday, September 15, 2011 - 5:23:57 PM
Last modification on : Thursday, September 24, 2020 - 6:30:04 PM

Identifiers

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⟩

Share

Metrics

Record views

275