Abstract
A simulation model of recrystallization and grain growth has been developed to investigate grain structure evolution during deformation and heat treatment in polycrystalline U-10 wt pct Mo (U-10Mo) fuel. Experimentally obtained U-10Mo post-homogenization microstructures were used as input for closed-loop simulations of multiple rolling passes, intermediate heating, and final annealing. Finite element model calculations of deformation and Potts model simulations of recrystallization and grain growth were used to iteratively inform each subsequent stage of simulation. The model was then applied to predict the grain structure evolution during multiple-pass hot rolling and annealing of U-10Mo and benchmarked against experimentally observed U-10Mo recrystallization behavior. The results showed that our model was able to capture the coupling between deformation and recrystallization as a function of microstructure, including particle stimulated nucleation and recrystallization nucleation on grain boundaries. Additionally, we have achieved reasonable quantitative agreement with U-10Mo recrystallization and grain growth behavior.
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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.
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Manuscript submitted August 20, 2019
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Frazier, W., Wang, C., Xu, Z. et al. Recrystallization and Grain Growth Simulations for Multiple-Pass Rolling and Annealing of U-10Mo. Metall Mater Trans A 51, 533–544 (2020). https://doi.org/10.1007/s11661-019-05582-6
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DOI: https://doi.org/10.1007/s11661-019-05582-6