Is there a relationship between the stacking fault character and the activated mode of plasticity of Fe-Mn-based austenitic steels ?

Hassane Idrissi (1) , L. Ryelandt (2) , M. Veron (3) , D. Schryvers (1) , P.J. Jacques (2)

1 Dept Phys.
2 UCL - Université Catholique de Louvain = Catholic University of Louvain
3 SIMaP - Science et Ingénierie des Matériaux et Procédés

By changing the testing temperature, an austenitic Fe-Mn-Al-Si alloy presents either epsilon-martensite transformation or mechanical twinning during straining. In order to understand the nucleation and growth mechanisms involved in both phenomena, defects and particularly stacking faults, were characterized by transmission electron microscopy. It is observed that the character of the stacking faults also changes (from extrinsic to intrinsic) together with the temperature and the activated mode of plasticity. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Mots clés: Stacking fault; Martensitic phase transformation; Twinning; Austenitic; steels; Deformation structure; single-crystals; fcc->hcp transformation; stainless-steels; deformation; energy; mechanisms; dependence; alloys; system; strain.; strain

Domaines: Matériaux

Hassane Idrissi, L. Ryelandt, M. Veron, D. Schryvers, P.J. Jacques. Is there a relationship between the stacking fault character and the activated mode of plasticity of Fe-Mn-based austenitic steels ?. Scripta Materialia, 2009, 60 (11), pp.941-944. ⟨10.1016/j.scriptamat.2009.01.040⟩. ⟨hal-00437166⟩