| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Materials Design and Alloy Development V – Design Fundamentals
|
| Presentation Title |
Effects of Oxygen Exposure and Powder Chemistry on Oxide Dispersion Strengthened Steels Printed with Gas Atomization Reaction Synthesis (GARS) Powders |
| Author(s) |
Matthew Dejong, Sourabh Saptarshi, Iver Anderson, Christopher Rock, Timothy Horn, Djamel Kaoumi |
| On-Site Speaker (Planned) |
Matthew Dejong |
| Abstract Scope |
Oxide-Dispersion Strengthened steels are promising candidates for structural applications for different industries (nuclear, fossil energy) thanks to their outstanding mechanical properties at high temperatures and radiation resistance. This is due to the presence of a fine dispersion of nano-scale oxides distributed throughout the matrix. Such microstructure is traditionally processed via mechanical alloying of steel and yttria powders, followed by consolidation, and thermo-mechanical processing, making it a costful process. Steel powder based on 14YWT composition was produced via gas atomization reaction synthesis and consolidated via LPBF in argon atmospheres with varying amounts of oxygen in order to prevent these defects. The process was successful in producing the oxide dispersion in a steel matrix. Microscopy (TEM) characterization was conducted on FIB liftouts and XRD was performed on printed samples. The impact of oxygen exposure and powder chemistry on oxide size distribution, as well as phases present in the printed parts are discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Iron and Steel, Characterization |