About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Coupled Grain Structure and Carbide Evolution during Rapid Thermal Cycling of an Fe-Cr-C Steel |
| Author(s) |
Bala Radhakrishnan, Younggil Song, Gary Cola |
| On-Site Speaker (Planned) |
Bala Radhakrishnan |
| Abstract Scope |
Excellent combinations of high strength and ductility have been achieved by rapid-thermal processing of low-alloy steels. The commercial Flash(TM) process produces a compositional heterogeneity in the microstructure resulting from dissolving carbides in austenite as it forms and grows at the carbide-ferrite matrix interface. The resulting on-cooling phase transformations lead to a bainite+martensite+austenite microstructure. The microstructural environment of the carbide particles during the thermal cycle is governed by their interaction with the evolving grain boundaries, resulting in intragranular or inter-granular dissolution with uniquely differing kinetics and solute profiles. We present phase field simulations of carbide and grain structure evolution in a polycrystal to capture the effect of processing parameters on the resulting patterns of heterogeneity in the microstructure prior to bainitic/martensitic transformation. Research performed at ORNL under contract DE-AC05-00OR22725 and supported by the Advanced Manufacturing Office through the HPC for Manufacturing Program at the Department of Energy. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |