| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
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| Symposium
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Spectroscopic Methods and Analysis for Nuclear Energy Related Materials
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| Presentation Title |
In-situ Synchrotron Diffraction Investigations of a Scalable, Non-equilibrium Processing Route of ODS Steels for Nuclear Power |
| Author(s) |
Zongyang Lyu, Kevin Jacob , Rameshwari Naorem , Siddhartha Pathak , Andrey Yakovenko, Nicolas Argibay, Jordan Tiarks , Iver Anderson |
| On-Site Speaker (Planned) |
Zongyang Lyu |
| Abstract Scope |
In this work, Fe-13.3Cr-2.86W-0.33Y-0.4Ti and Fe-14Cr-2.86W-0.35Y-0.18Ti-0.42Zr (wt.%) were developed as an alternative to oxide-dispersion strengthened (ODS) 14YWT alloy, enabled by non-equilibrium powder-based methods. Gas atomization reaction synthesis (GARS) was used to fabricate metastable alloy powders, which can be consolidated and machined at low temperatures. In-situ synchrotron diffraction tests were performed on the two alloy powder samples, using linear heating and cooling profiles. The sequential decompositions of the Cr2O3 and Y2O3 phases were observed during heating, which provided a primary source of oxygen for the continued formation of the Y-Ti/(Zr, Ti)-O phase(s). Then nano-sized Y-Ti/(Zr, Ti)-O particles (~9-22 nm) were generated in the alloy powders, confirmed by TEM results. This data is being used to inform the processing of tubes and plates for insertion in advanced nuclear (fission) reactors and as a low-cost structural layer in fusion plasma containment. Work funded by USDOE-NE through Ames Lab contract DE-AC02-07CH11358. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Nuclear Materials, Powder Materials |