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Title: 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:
 [1];  [1];  [1];  [1]
  1. 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:
Journal Article: 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. 2015. "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},
url = {https://www.osti.gov/biblio/1236571}, journal = {Physical Review Letters},
issn = {0031-9007},
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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Cited by: 87 works
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Works referencing / citing this record:

Morphology and crystalline evolution of tungsten induced by low-energy helium ions irradiation
journal, November 2018


Hardening and Strain Localisation in Helium-Ion-Implanted Tungsten
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The thermodynamic and kinetic interactions of He interstitial clusters with bubbles in W
journal, May 2016


He-ion induced surface morphology change and nanofuzz growth on hot tungsten surfaces
journal, December 2018


Helium in-plane migration behavior on 〈1 0 0〉 symmetric tilt grain boundaries in tungsten
journal, July 2018


Clustering and dislocation loop punching induced by different noble gas bubbles in tungsten: a molecular dynamics study
journal, August 2019


Ion radiation albedo effect: influence of surface roughness on ion implantation and sputtering of materials
journal, December 2016


Recent advances in modeling and simulation of the exposure and response of tungsten to fusion energy conditions
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Continuum-scale modeling of helium bubble bursting under plasma-exposed tungsten surfaces
journal, November 2018


On the origin of ‘fuzz’ formation in plasma-facing materials
journal, July 2019


The evolution of He nanobubbles in tungsten under fusion-relevant He ion irradiation conditions
journal, June 2019


Radiation-Induced Helium Bubbles in Metals
journal, March 2019


An Overview of Recent Standard and Accelerated Molecular Dynamics Simulations of Helium Behavior in Tungsten
journal, August 2019


Hardening and Strain Localisation in Helium-Ion-Implanted Tungsten
journal, January 2019