About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fundamentals of Sustainable Metallurgy and Materials Science
|
| Presentation Title |
Hydrogen-Based Net-Shape Processing of Oxide-Dispersion-Strengthened Steels |
| Author(s) |
Samrin Saiyara, Alexander Mathias, Naresh Thadhani, Robert Speyer, Josh Kacher |
| On-Site Speaker (Planned) |
Samrin Saiyara |
| Abstract Scope |
Oxide-dispersion-strengthened (ODS) steels are promising high-temperature structural materials due to their creep resistance, oxidation resistance, and microstructural stability. However, conventional ODS processing relies on mechanical alloying, consolidation, and extensive thermomechanical processing, making it energy-intensive and ill-suited to near-net-shape manufacturing. This work investigates a hydrogen-based oxide-to-metal route for producing ODS steels directly from mixed oxide powder precursors. Matrix-forming oxides are blended with thermodynamically stable oxide dispersoids and polymer binders to create a formable feedstock suitable for extrusion or compaction. During hydrogen reduction and high-temperature sintering, the matrix oxides are selectively reduced to form a metallic Fe-based matrix, while stable oxide particles are retained as nano- or microscale dispersions. Effects of particle size, dispersoid loading, geometry, temperature, dwell time, and hydrogen flow are examined using electron microscopy and X-ray characterization. This work provides a foundation for low-emission, near-net-shape ODS steel processing and offers insight into particle-scale transport in hydrogen-based steelmaking. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Sustainability, Iron and Steel, |