期刊
JOURNAL OF NUCLEAR MATERIALS
卷 492, 期 -, 页码 74-87出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnucmat.2017.04.026
关键词
alpha-Uranium; Recrystallization; Monte carlo; Potts modeling; EBSD
资金
- Y-12 National Security Complex under the Plant Directed Research, Development, and Demonstrstion program
- United States Government [DE NA 0001942]
- U.S. Department of Energy/National Nuclear Security Administration [DE NA 0001942]
- Los Alamos National Laboratory Directed Research and Development (LDRD) [20140630 ER]
- DOE [DE-AC52-06NA25396]
Starting with electron backscattered diffraction (EBSD) data obtained from a warm clock-rolled alpha-uranium deformation microstructure, a Potts Monte Carlo model was used to simulate static site-saturated recrystallization and test which recrystallization nucleation conditions within the microstructure are best validated by experimental observations. The simulations support prior observations that recrystallized nuclei within alpha-uranium form preferentially on non-twin high-angle grain boundary sites at 450 degrees C. They also demonstrate, in a new finding, that nucleation along these boundaries occurs only at a highly constrained subset of sites possessing the largest degrees of local deformation. Deformation in the EBSD data can be identified by the Kernel Average Misorientation (KAM), which may be considered as a proxy for the local geometrically necessary dislocation (GND) density. (C) 2017 Elsevier B.V. All rights reserved.
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