Toward a new interpretation of the mechanical behaviour of As-quenched low alloyed martensitic steels

Sébastien Allain (1) , Olivier Bouaziz (2, 3) , M. Takahashi

1 ArcelorMittal
2 ArcelorMittal Maizières Research SA
3 MAT - Centre des Matériaux

Though as-quenched martensite exhibits a low uniform elongation in tension, it is highlighted that this phase has a very high strain-hardening which increases with carbon content and a large Bauschinger effect. Because usual dislocation storage can not explain reasonably this particular behaviour, an approach based on a continuum composite view of martensite (CCA) is developed suitable to capture all the experimental features.

Mots clés: martensite; carbon; strain-hardening; Bauschinger; composite; modelling

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

Sébastien Allain, Olivier Bouaziz, M. Takahashi. Toward a new interpretation of the mechanical behaviour of As-quenched low alloyed martensitic steels. ISIJ international, 2012, 52, pp.717-722. ⟨10.2355/isijinternational.52.717⟩. ⟨hal-00700985⟩