|About this Abstract
||MS&T23: Materials Science & Technology
||Metal Powder Synthesis and Processing: Fundamental Aspects and Modeling
||Vacuum Hot Pressing of Oxide-dispersion Strengthened (ODS) Ferritic Steel Powders Guided by Temperature-scanning High-energy X-ray Powder Diffraction Analysis
||Landon M. Hickman, Emma Cockburn, Nicolas Argibay, Jordan Tiarks, Rameshawari (Sherry) Naorem, Iver Anderson, Sid Pathak
|On-Site Speaker (Planned)
||Landon M. Hickman
Oxide-dispersion strengthened (ODS) ferritic steels have potential to replace current alloys in next-generation nuclear fuel rod claddings and heat exchangers, enabling higher operating temperatures, higher neutron flux levels, and improved reliability and damage resistance. Traditional manufacturing of ODS steels require mechanically alloyed (MA) powders because conventional powder metallurgy would not result in the desired nanostructure. Gas atomization reaction synthesis (GARS) may replace MA for powder-based fabrication of nanostructured ODS steels. We present a route for achieving full density shapes using GARS powders and vacuum hot pressing (VHP), followed by thermomechanical processing to establish nanostructured ODS in sheet materials. Results reveal post-sintered density, microstructures, and hardness of ODS steel compacts and sheet from GARS powders that depend on VHP and heat treatment conditions guided by temperature-scanning high-energy x-ray diffraction. Work supported by Advanced Photon Source (APS) of Argonne National Lab (USDOE) and DOE-NE-NEUP funding through Ames National Lab (contract No. DE-AC02-07CH11358).