Competing Kinetics and He Bubble Morphology in W
Abstract
We found that the growth process of He bubbles in W is investigated using molecular dynamics and parallel replica dynamics for growth rates spanning 6 orders of magnitude. Fast and slow growth regimes are defined relative to typical diffusion hopping times of W interstitials around the He bubble. Moreover, slow growth rates allow the diffusion of interstitials around the bubble, favoring the biased growth of the bubble towards the surface. In contrast, at fast growth rates interstitials do not have time to diffuse around the bubble, leading to a more isotropic growth and increasing the surface damage.
- Authors:
-
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1236571
- Alternate Identifier(s):
- OSTI ID: 1181551
- Report Number(s):
- LA-UR-14-26542
Journal ID: ISSN 0031-9007; PRLTAO
- Grant/Contract Number:
- AC02-05CH11231; AC05-00OR22725; AC52-O6NA25396
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 114; Journal Issue: 10; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Sandoval, Luis, Perez, Danny, Uberuaga, Blas P., and Voter, Arthur F. Competing Kinetics and He Bubble Morphology in W. United States: N. p., 2015.
Web. doi:10.1103/PhysRevLett.114.105502.
Sandoval, Luis, Perez, Danny, Uberuaga, Blas P., & Voter, Arthur F. Competing Kinetics and He Bubble Morphology in W. United States. https://doi.org/10.1103/PhysRevLett.114.105502
Sandoval, Luis, Perez, Danny, Uberuaga, Blas P., and Voter, Arthur F. Wed .
"Competing Kinetics and He Bubble Morphology in W". United States. https://doi.org/10.1103/PhysRevLett.114.105502. https://www.osti.gov/servlets/purl/1236571.
@article{osti_1236571,
title = {Competing Kinetics and He Bubble Morphology in W},
author = {Sandoval, Luis and Perez, Danny and Uberuaga, Blas P. and Voter, Arthur F.},
abstractNote = {We found that the growth process of He bubbles in W is investigated using molecular dynamics and parallel replica dynamics for growth rates spanning 6 orders of magnitude. Fast and slow growth regimes are defined relative to typical diffusion hopping times of W interstitials around the He bubble. Moreover, slow growth rates allow the diffusion of interstitials around the bubble, favoring the biased growth of the bubble towards the surface. In contrast, at fast growth rates interstitials do not have time to diffuse around the bubble, leading to a more isotropic growth and increasing the surface damage.},
doi = {10.1103/PhysRevLett.114.105502},
journal = {Physical Review Letters},
number = 10,
volume = 114,
place = {United States},
year = {Wed Mar 11 00:00:00 EDT 2015},
month = {Wed Mar 11 00:00:00 EDT 2015}
}
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