| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Austenite Formation and Decomposition V: A Symposium in Memory of Prof. Mats Hillert
|
| Presentation Title |
Nanoscale Investigation of Austenite To Ferrite Transformation Interfaces in Fe-Mn-C Steel |
| Author(s) |
Olha Nakonechna, Frederic Danoix, Helena Zapolsky, Mohamed Gouné |
| On-Site Speaker (Planned) |
Olha Nakonechna |
| Abstract Scope |
Austenite-ferrite phase transformation is a key reaction for the production of most modern steels. It has long been realised that the interaction of alloying elements with the transformation interface directly affects the kinetics of ferrite growth and can be critical for a profound understanding of this phase transformation mechanism. In this work, interfacial segregation in a Fe-C-Mn model alloy is experimentally investigated by APT, a well-suited technique for quantitatively measuring the solute concentration profile across interfaces at the near-atomic scale. The site-specific sample preparation combined the advanced EBSD, FIB, and TKD techniques. Orientation relationships (ORs) at the interface between the formed ferrite and prior austenite, which may affect the interface mobility, were determined from EBSD data. A large number of γ/α interfaces were successfully analysed, and the Mn composition profiles through interfaces were discussed and compared to the predictions of existing models for austenite-to-ferrite transformation in steel. |