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

Abstract

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 and test which recrystallization nucleation conditions within the microstructure are best validated by experimental observations. The simulations support prior observations that recrystallized nuclei within α-uranium form preferentially on non-twin high-angle grain boundary sites at 450°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.

Authors:
; ; ;
Publication Date:
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 National Nuclear Security Administration (NNSA)
OSTI Identifier:
1356133
Alternate Identifier(s):
OSTI ID: 1357186; OSTI ID: 1416830
Report Number(s):
LA-UR-16-25109; MS/GAR-170323-2
Journal ID: ISSN 0022-3115
Grant/Contract Number:  
AC52-06NA25396; NA0001942; DE NA 0001942; 20140630 ER
Resource 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
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

Citation Formats

Steiner, M. A., McCabe, R. J., Garlea, E., and Agnew, S. R. Monte Carlo modeling of recrystallization processes in α-uranium. United States: N. p., 2017. Web. doi:10.1016/j.jnucmat.2017.04.026.
Steiner, M. A., McCabe, R. J., Garlea, E., & Agnew, S. R. Monte Carlo modeling of recrystallization processes in α-uranium. United States. https://doi.org/10.1016/j.jnucmat.2017.04.026
Steiner, M. A., McCabe, R. J., Garlea, E., and Agnew, S. R. Tue . "Monte Carlo modeling of recrystallization processes in α-uranium". United States. https://doi.org/10.1016/j.jnucmat.2017.04.026. https://www.osti.gov/servlets/purl/1356133.
@article{osti_1356133,
title = {Monte Carlo modeling of recrystallization processes in α-uranium},
author = {Steiner, M. A. and McCabe, R. J. and Garlea, E. and Agnew, S. R.},
abstractNote = {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 and test which recrystallization nucleation conditions within the microstructure are best validated by experimental observations. The simulations support prior observations that recrystallized nuclei within α-uranium form preferentially on non-twin high-angle grain boundary sites at 450°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.},
doi = {10.1016/j.jnucmat.2017.04.026},
journal = {Journal of Nuclear Materials},
number = C,
volume = 492,
place = {United States},
year = {Tue Aug 01 00:00:00 EDT 2017},
month = {Tue Aug 01 00:00:00 EDT 2017}
}

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Cited by: 23 works
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Works referencing / citing this record:

Study on texture and dynamic recrystallization behavior of high purity copper during reverse extrusion
journal, December 2019