Abstract
A dislocation–density-based multiple slip crystalline plasticity formulation and a specialized finite-element approach were developed and used to investigate behavior in hexagonal cubic packed with a focus on zircaloy-2 aggregates. The validated predictive framework can account for the interrelated effects of dislocation–density interactions, generation, and recovery. An energy criterion is used to identify 63 unique slip system interactions that can result in either junction formation or slip-system annihilation. These dislocation–density interactions, with the interrelated mechanisms due to recovery and generation, can then be used to understand and predict why basal planes are strengthening planes and prismatic planes are the dominant toughening planes.
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Acknowledgments
The support from the Consortium for Advanced Simulation of Light Water Reactors an Energy Innovation Hub for Modeling and Simulation of Nuclear Reactors under U.S. Department of Energy Contract No. DE-AC05-00OR227 and the partial support from ARO Grant W911NF-12-1-0329 are gratefully acknowledged.
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Manuscript Submitted April 15, 2014.
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Ziaei, S., Zikry, M.A. Modeling the Effects of Dislocation–Density Interaction, Generation, and Recovery on the Behavior of H.C.P. Materials. Metall Mater Trans A 46, 4478–4490 (2015). https://doi.org/10.1007/s11661-014-2635-0
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DOI: https://doi.org/10.1007/s11661-014-2635-0