About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Computational Thermodynamics and Kinetics
|
Presentation Title |
Quantifying the Effect of External Magnetic Fields on Carbon Diffusion in Ferrite |
Author(s) |
Luke Wirth, Dallas Trinkle |
On-Site Speaker (Planned) |
Luke Wirth |
Abstract Scope |
Externally applied magnetic fields affect the phase diagrams of Fe–C steels, enabling induction-coupled thermomagnetic processing (ITMP) to access the kinetics of given structures at higher temperatures than are available to conventional processing methodologies. We quantify the effects of external fields on carbon diffusion in BCC Fe with a two-part approach: first, by calculating the magnetizations expected under high fields at processing temperatures and investigating the magnetic orderings contained within, and then using density functional theory (DFT) to calculate activation energy barriers to individual carbon hops throughout local environments of various magnetic orderings. Diffusion theory brings these calculations together to create a model for D(B, T). We compare our predicted diffusivities with those observed experimentally in the presence and absence of external fields. |
Proceedings Inclusion? |
Planned: |
Keywords |
Modeling and Simulation, Iron and Steel, Computational Materials Science & Engineering |