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Title: Monte Carlo modeling of recrystallization processes in α-uranium

In this study, starting with electron backscattered diffraction (EBSD) data obtained from a warm clock-rolled α-uranium deformation microstructure, a Potts Monte Carlo model was used to simulate static site-saturated recrystallization while testing a number of different conditions for the assignment of recrystallized nuclei within the microstructure. The simulations support observations that recrystallized nuclei within α-uranium form preferentially on non-twin high-angle grain boundary sites at 450 °C, and demonstrate that the most likely nucleation sites on these boundaries can be identified by the surrounding degree of Kernel Average Misorientation (KAM), which may be considered as a proxy for the local geometrically necessary dislocation (GND) density.
Authors:
; ; ;
Publication Date:
Report Number(s):
LA-UR-16-25109; MS/GAR-170323-2
Journal ID: ISSN 0022-3115
Grant/Contract Number:
AC52-06NA25396; NA0001942; 20140630 ER
Type:
Accepted Manuscript
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
Journal Volume: 492; Journal Issue: C; Journal ID: ISSN 0022-3115
Publisher:
Elsevier
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Oak Ridge Y-12 Plant (Y-12), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; uranium recrystallization Potts modeling EBSD Monte Carlo; α-uranium; recrystallization; Monte Carlo; Potts modeling; EBSD
OSTI Identifier:
1356133
Alternate Identifier(s):
OSTI ID: 1357186; OSTI ID: 1416830