| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
New Frontiers in Physical Metallurgy of Steels
|
| Presentation Title |
Nanoscale Investigation of Austenite/ferrite Interfaces in Medium Carbon Fe-Mn-C Steels at Different Inter-critical Temperatures |
| Author(s) |
Olha Nakonechna, Fredric Danoix, Helena Zapolsky, Didier Huin, Nicolas Charbonnier, Lionel Germain, Mohamed Gouné |
| On-Site Speaker (Planned) |
Olha Nakonechna |
| Abstract Scope |
The austenite-to-ferrite phase transformation plays a critical role in tailoring the final steel microstructure during the processing of advanced high-strength steels (AHSS), such as Dual-Phase steels. It has long been realized that the interaction between the alloying elements and the migrating transformation interface directly affects the kinetics of ferrite growth and can be critical for a profound understanding of the austenite-to-ferrite phase transformation mechanism. The transformation rate may also depend on the interface's ability to dissipate free energy due to its crystallographic nature. Therefore, in this paper, the atomic scale redistribution of the alloying elements across the austenite-ferrite interface in a model Fe-C-Mn steels are investigated. Different alpha/gamma interfaces corresponding to various experimental conditions were selectively analyzed. The profiles of both C and Mn through the transformation interface were discussed on the basis of the existing interfacial models for ferrite transformation in steels. |