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Meeting 2026 TMS Annual Meeting & Exhibition
Symposium Thermodynamics and Kinetics of Alloys IV
Presentation Title Enhancing Steel Metallurgy Through Thermomagnetic Processing: Impacts on Thermodynamics and Kinetics
Author(s) Yang Yang, Ramon Padin-Monroig, Michael Kesler, Mark Meisel, Michael Tonks, Michele Manuel
On-Site Speaker (Planned) Yang Yang
Abstract Scope Thermomagnetic processing (TMP), which applies high magnetic fields during steel heat treatment, presents a promising route to improve energy efficiency and microstructural control. However, the underlying thermodynamic and kinetic mechanisms remain insufficiently understood. This study examined the effects of magnetic fields (up to 9 T) on Fe-C alloys using two approaches: in-field annealing to evaluate phase equilibria and diffusion couple experiments to assess carbon kinetics. Ferrite stabilization was observed, accompanied by an upward shift in the A3 phase boundary and anisotropic grain morphologies aligned with the field direction. Concurrently, carbon diffusivity in austenite decreased with increasing field strength, attributed to higher activation energies induced by magnetostriction. These findings support the construction of a field-dependent Fe-C phase diagram and a corresponding kinetic database, providing insight into how TMP affects phase transformation and diffusion behavior. The results offer a mechanistic foundation for advancing energy-efficient, field-assisted steel processing.
Proceedings Inclusion? Planned:
Keywords Phase Transformations, Iron and Steel, Process Technology

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