Abstract
It is well established that exposure of metallic structural materials to irradiation environments results in significant microstructural evolution, property changes, and performance degradation, which limits the extended operation of current generation light water reactors and restricts the design of advanced fission and fusion reactors. Further, it is well recognized that these irradiation effects are a classic example of inherently multiscale phenomena and that the mix of radiation-induced features formed and the corresponding property degradation depend on a wide range of material and irradiation variables. This inherently multiscale evolution emphasizes the importance of closely integrating models with high-resolution experimental characterization of the evolving radiation-damaged microstructure. This article provides a review of recent models of the defect microstructure evolution in irradiated body-centered cubic materials, which provide good agreement with experimental measurements, and presents some outstanding challenges, which will require coordinated high-resolution characterization and modeling to resolve.
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ACKNOWLEDGMENTS
The authors thank our experimental collaborators, Djamel Kaoumi, Cem Topbasi, and Arthur Motta for helpful discussions and gratefully acknowledge financial support from the U.S. Department of Energy, Office of Fusion Energy Sciences under grant DOE-DE-SC0006661 and the U.S. Department of Energy, Office of Nuclear Energy, Nuclear Energy University Programs (NEUP).
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Wirth, B.D., Hu, X., Kohnert, A. et al. Modeling defect cluster evolution in irradiated structural materials: Focus on comparing to high-resolution experimental characterization studies. Journal of Materials Research 30, 1440–1455 (2015). https://doi.org/10.1557/jmr.2015.25
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DOI: https://doi.org/10.1557/jmr.2015.25