New insights into alloying elements interaction with α-ferrite/γ-austenite migrating interface in Fe-C-Mn system
M. Gouné1, F. Danoix2, X. Sauvage2, D. Huin3, L. Germain, S. Allain4
1 ICMCB-CNRS, 87 Avenue du Docteur Schweitzer, 33608 Pessac, France
2 GPM-Université de Rouen, BP12 76801 Saint-Etienne du Rouvray, France
3 Maizieres Automotive Products R&D, BP 30320, 57283 Maizières-les-Metz Cedex, France
4 Institut Jean Lamour, Ecole des Mines de Nancy, Parc de Saurupt, 54042 Nancy Cedex, France
* corresponding author : mm.goune@gmail.com
The development of modern steels depends on the increased understanding of the function of alloying elements in steels and in particular of their role in the phase transformations. The process of phase transformation depends on complex interactions between elements and transformation interfaces. Their analysis is often difficult for the reason that they occur at the nanoscale and in the vicinity of an interface of few atomic plans thick. However, the experimental and theoretical techniques had become much more powerful over the last decade, that is seems fruitful to return to this topic of interest with fresh eyes. In the present work, by coupling 3D Atom Probe Tomography (ATP), TEM and modelling at the scale of phases, we propose to deal with two main topics:
- The interfacial contact conditions at moving ferrite/austenite interface in Fe-C-Mn system.
- The mechanisms of carbon enrichment in austenite during quenching and partitioning (Q&P).
Prof. Mohamed Gouné
Métallurgie et Materiaux Fonctionnels
Université de Bordeaux
ICMCB - CNRS
UPR9048
87, Avenue du Docteur Schweitzer
33608 PESSAC cedex (France)
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