About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Accelerated Qualification of Nuclear Materials Integrating Experiments, Modeling, and Theories
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Presentation Title |
Perspectives on the Pesky Problem of Post-Irradiation Hardening in Wrought FeCrAl Alloys |
Author(s) |
Caleb Massey, Ben Garrison, Annabelle Le Coq, Yukinori Yamamoto, Jason Harp |
On-Site Speaker (Planned) |
Caleb Massey |
Abstract Scope |
FeCrAl alloys are currently being evaluated as an accident-tolerant fuel cladding alternative to existing Zr-based alloys in the current fleet of boiling water reactors (BWRs). This alloy system has shown to be resilient in simulated loss-of-coolant accident scenarios, but the lower operating temperature of BWR’s (~300ºC) results in irradiation hardening/embrittlement in this class of body-centered cubic Fe-based alloys due to a combination of dislocation loop formation and Fe-Cr phase separation. This work provides a comparison of prior data for High Flux Isotope Reactor (HFIR) irradiated FeCrAl alloys of nominal composition Fe-(10-13)Cr-6Al-2Mo (wt.%) in comparison to recent post-irradiation microstructure characterization of C26M also irradiated in HFIR but subjected to different pre-irradiation thermomechanical processing treatments. These processing steps involved hot forging, hot rolling, and a subsequent optional warm-rolling step to increase the pre-irradiation dislocation density. Trends in irradiation hardening behavior are compared as a function of irradiation dose and temperature. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Nuclear Materials, Mechanical Properties |