| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Characterization of Minerals, Metals and Materials 2025: In-Situ Characterization Techniques
|
| Presentation Title |
In-Situ TEM Study of Dissociation of Retained Austenite in Carbide Free Bainitic Steel During Tempering at 400 ℃ |
| Author(s) |
Kishore Sakthivel, Sourav Das |
| On-Site Speaker (Planned) |
Kishore Sakthivel |
| Abstract Scope |
Tempering causes the redistribution of carbon within the steel matrix in carbide-free bainitic steel where the austenite can be present in film and blocky type morphology. It has been observed in the current in-situ study of exposing a carbide-free bainitic steel (having primarily bainite and austenite as microstructural constituents) at 400 ℃ for 1 hr inside a TEM, that the annihilation of dislocations around the region of film type austenite is the first event to take place followed by the precipitation of cementite particles in these regions. However, the dissociation of blocky type austenite happens at the end when the film type austenite regions are fully degenerated at the temperature of interest. Such higher thermal stability of blocky type austenite having less carbon enrichment in contrary to the higher mechanical stability of film type austenite where high carbon concentration happens as resultant of bainitic transformation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Phase Transformations, Iron and Steel |