Glover, Alexandra Gannon, Zappulla, Matthew Lee Salvatore
Recent advancements in high-pressure gas-quench furnaces have enabled them to achieve heat transfer coefficients comparable to oil-quench furnaces across various applications. These furnaces offer numerous benefits, including a smaller footprint, reduced waste generation, and a consistent quench rate over a range of temperatures. This study aimed to evaluate the feasibility of introducing a high-pressure gas quenching furnace at the Sigma facility for the processing of uranium alloys through an experimental matrix. Results from experiments conducted during fiscal years 2021 and 2022 indicated that high-pressure gas quenching may not deliver the necessary cooling rates for uranium-based alloys such as U-6wt%Nb. In contrast, traditional liquid quenching processes demonstrated adequate cooling rates, with maximum surface and core quench rates measured at 51.7 °C/s and 28.8 °C/s, respectively. The findings accentuate the importance of analytical assessments in selecting appropriate quenching methods for uranium alloys and suggest that future work will focus on refining quench rates and analyzing geometric distortion of U-6wt%Nb castings using a traditional oil-quench furnace. This will culminate in a comprehensive technical report detailing the experimental outcomes.
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