Article révisé par les pairs
Résumé : The improvement of the mech. behavior of high performance steels brings about a renewed interest for the work hardening rate resulting from deformation-induced martensitic transformation or mech. twinning. Even if these mechanisms are known for quite a long time, the deformation - transformation interactions that they induce is not yet fully characterized and understood. This study aims at characterizing the microstructure evolution of a Fe-Mn steel grade during straining thanks to TEM and high resoln. OIM. Particular patterns of austenite - ε and α' martensite are found.