Competing Kinetics and He Bubble Morphology in W

Sandoval, Luis; Perez, Danny; Uberuaga, Blas P.; Voter, Arthur F.

doi:10.1103/PhysRevLett.114.105502

Title: Competing Kinetics and He Bubble Morphology in W

Journal Article · Wed Mar 11 00:00:00 EDT 2015 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.114.105502· OSTI ID:1236571

Sandoval, Luis ^[1]; Perez, Danny ^[1]; Uberuaga, Blas P. ^[1]; Voter, Arthur F. ^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

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.

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Research Organization:: 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 Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC02-05CH11231; AC05-00OR22725; AC52-O6NA25396

OSTI ID:: 1236571

Alternate ID(s):: OSTI ID: 1181551

Report Number(s):: LA-UR-14-26542; PRLTAO

Journal Information:: Physical Review Letters, Vol. 114, Issue 10; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 87 works

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