| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Effect of the Heating Rate on the Austenite Formation Kinetics by Isoconversion Method in Cr-Mo-V Steel |
| Author(s) |
Ricardo Guzman-Garfias, Octavio Vázquez-Gómez, Pedro Garnica-González, Héctor Javier Vergara-Hernández , José Antonio Barrera-Godínez |
| On-Site Speaker (Planned) |
Ricardo Guzman-Garfias |
| Abstract Scope |
The kinetics of austenite formation in a Cr-Mo-V low-alloy medium-carbon steel was determined by dilatometric analysis under continuous and isochronous heating conditions. The dilatometric analysis was carried out at different heating rates, and it was observed that austenite formation occurs in two stages: 1) decomposition of carbides and 2) transformation of ferrite into austenite. It was also shown that the critical temperatures for austenite formation increase with increasing heating rate. Likewise, the continuous heating transformation diagram was constructed from the critical temperatures, indicating the transformation zones during austenite formation. The degree or volume fraction of austenite formed was determined as a function of the heating rate and the temperature per transformation stage. Finally, an iso-conversion method was implemented to determine the activation energies in stages at 50% transformation |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Iron and Steel, Characterization |