| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
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| Symposium
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Nanostructured Materials in Extreme Environments II
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| Presentation Title |
Simplified Production of ODS-Ferritic Alloys for Long-life Reactor Fuel Assembly Ducts |
| Author(s) |
Jordan Tiarks, Iver E. Anderson, Landon M. Hickman, Emma Cockburn, Nicolas Argibay, Hyojung Kim, Stuart Andrew Maloy, Siddhartha Pathak |
| On-Site Speaker (Planned) |
Jordan Tiarks |
| Abstract Scope |
Simplified processing for (pyrochlore) oxide-dispersion strengthened (ODS) ferritic alloys in sheet form is being developed via conventional full-density powder metallurgy (PM) techniques. A two-step process drives the formation of nanoscale oxide precipitates through a high-temperature thermally-activated oxidation exchange reaction after consolidation. We demonstrate this process with an alloy that is modified from “14YWT,” 82.4Fe-14.0Cr-0.20Y-3.0W-0.4Ti (wt.%). Powder was produced via gas atomization reaction synthesis (GARS), through which a metastable oxygen-enriched shell is generated with a prescribed thickness. This powder was then consolidated to full density using vacuum hot pressing at a temperature chosen to promote densification and partial sintering. Temperature-scanning high-energy XRD was used to investigate the phase evolution in GARS powders at the Advanced Photon Source (APS) at Argonne National Lab and used to guide hot pressing optimization to produce compacts for sheet forming before annealing to full strength. Work funded by USDOE-NE through Ames Lab contract DE-AC02-07CH11358. |
| Proceedings Inclusion? |
Planned: |