Abstract
Uranium alloyed with 10 wt pct Mo (U-10Mo) undergoes discontinuous precipitation (DP) when subjected to sub-eutectoid heat treatment. It is hypothesized that the crystallographic texture of the U-10Mo can be modified to minimize the degree of DP, however, the evolution of texture throughout the manufacturing process is not well understood. Crystallographic textures evolution of two U-10Mo samples homogenized at 900 °C and 1000 °C were investigated after uniaxial rolling and annealing. A total of six samples were analyzed upon rolling using a combination of hot and cold rolling conditions to thickness reductions of 83, 90, and 97 pct and subsequently annealed at 700 °C for 1 hour. Microstructures and textures were analyzed via electron backscatter diffraction (EBSD) for each reduction and post-annealed states. Results show that the U-10Mo exhibits typical rolling textures seen in body-centered cubic materials with prominent α- and γ-fibers with each reduction. After recrystallization, the texture was effectively randomized in all samples. Homogenization temperature showed a minimal impact on the rolling and recrystallization behavior. Potential factors leading to the randomization of texture are discussed along with the implications of textures on the minimization of DP.
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Acknowledgments
This work was supported by the U.S. Department of Energy (DOE) National Nuclear Security Administration, for the Office of Materials Management and Minimization (M3) under Contract DE-AC05-76RL01830. The authors thank Mark Rhodes and Alan Schemer-Kohrn of PNNL for assisting in the microstructural characterization, and all the other staff directly or indirectly associated with producing the results featured in this publication. B.J.S. would like to acknowledge Dr. Sina Shahrezaei of PNNL for his continuing discussion regarding U-10Mo characterization and analysis.
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Manuscript submitted on February 8, 2021; accepted June 2, 2021.
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Schuessler, B.J., Field, D.P., Overman, N.R. et al. The Effect of Homogenization Heat Treatment on the Texture Evolution in U-10Mo Alloy. Metall Mater Trans A 52, 3871–3879 (2021). https://doi.org/10.1007/s11661-021-06349-8
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DOI: https://doi.org/10.1007/s11661-021-06349-8