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Titolo:
Multiscale modeling of radiation damage: applications to damage productionby GeV proton irradiation of Cu and W, and pulsed irradiation effects in Cu and Fe
Autore:
Caturla, MJ; de la Rubia, TD; Victoria, M; Corzine, RK; James, MR; Greene, GA;
Indirizzi:
Swiss Fed Inst Technol, Ctr Res Plasma Phys, Fus Mat Technol Div, CH-5232 Villigen, Switzerland Swiss Fed Inst Technol Villigen Switzerland CH-5232illigen, Switzerland Univ Calif Lawrence Livermore Natl Lab, Livermore, CA 94550 USA Univ CalifLawrence Livermore Natl Lab Livermore CA USA 94550 A 94550 USA Univ Calif Los Alamos Natl Lab, Los Alamos, NM 87545 USA Univ Calif Los Alamos Natl Lab Los Alamos NM USA 87545 amos, NM 87545 USA Brookhaven Natl Lab, Upton, NY 11973 USA Brookhaven Natl Lab Upton NY USA11973 aven Natl Lab, Upton, NY 11973 USA
Titolo Testata:
JOURNAL OF NUCLEAR MATERIALS
, volume: 296, anno: 2001,
pagine: 90 - 100
SICI:
0022-3115(200107)296:<90:MMORDA>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
DISPLACEMENT CASCADES; COMPUTER-SIMULATION; MOLECULAR-DYNAMICS; METALS; EVOLUTION; FCC;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
18
Recensione:
Indirizzi per estratti:
Indirizzo: Victoria, M Swiss Fed Inst Technol, Ctr Res Plasma Phys, Fus Mat Technol Div, CH-5232 Villigen, Switzerland Swiss Fed Inst Technol Villigen Switzerland CH-5232 tzerland
Citazione:
M.J. Caturla et al., "Multiscale modeling of radiation damage: applications to damage productionby GeV proton irradiation of Cu and W, and pulsed irradiation effects in Cu and Fe", J NUCL MAT, 296, 2001, pp. 90-100

Abstract

The damage accumulation in Cu and W is investigated using a multiscale modeling approach. The efficiency for defect production of displacement cascades is calculated using molecular dynamics (MD). The simulation uses the recoil spectra from spallation reactions of 1.1 and 1.9 GeV protons as calculated with the Los Alamos High Energy Transport (LAHET) nuclear transport code. The total number of defects produced under these irradiation conditions is obtained both from the NRT and MID approximations. The value for the change in electrical resistivity produced by the irradiation-induced defect microstructure is compared to experimental values obtained from irradiations with protons of the above energies, showing a better agreement for the lower irradiation energy. The damage evolution is simulated with kinetic Monte Carlo, where the inputs for the calculation are the results from MID previously obtained. A large recovery of the damage is found at room temperature as a result of the migration of interstitial clusters, single vacancies andsmall vacancy clusters to sinks such as dislocations. Finally the effects of pulsed irradiation have been analyzed in Cu. and Fe with similar simulation tools. The results indicate a clear influence of pulsing at I Hz, but not at higher frequencies. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 06/04/20 alle ore 02:10:52