Multilayer Modelling of Stainless Steel with Nanocrystallized Superficial Layer

Johann Petit (1) , Laurent Waltz (2) , Guillaume Montay (3) , Delphine Retraint (3) , Arjen Roos (3) , Manuel François (3)

1 LEME - Laboratoire Energétique Mécanique Electromagnétisme
2 ThM2 - ThermoMécanique des Matériaux
3 LASMIS - Laboratoire des Systèmes Mécaniques et d'Ingénierie Simultanée

In order to obtain the macroscopic mechanical response of a 316L stainless steel, nanocrystallized by a SMAT treatment, a multilayer model is proposed. The constitutive behaviour of each layer is determined from tensile tests or by an inverse method and its thickness is evaluated from SEM and TEM micrographic analyses and local hardness measurements. The consistency of the model is verified by its ability to predict the strain at which diffuse necking occurs.

Mots clés: Modelling; Tensile Test; Localization; Electronic Speckle Pattern Interferometry (ESPI); SMAT; Nanocrystalline Materials

Domaines: Mécanique des matériaux [physics.class-ph]; Mécanique des matériaux [physics.class-ph]

Johann Petit, Laurent Waltz, Guillaume Montay, Delphine Retraint, Arjen Roos, et al.. Multilayer Modelling of Stainless Steel with Nanocrystallized Superficial Layer. Materials Science and Engineering: A, 2012, 536, pp.124-128. ⟨10.1016/j.msea.2011.12.085⟩. ⟨hal-00720652⟩