Langevin model for real-time Brownian dynamics of interacting nanodefects in irradiated metals

Journal Article · Tue Jun 01 00:00:00 EDT 2010 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.81.224107· OSTI ID:21386739

Dudarev, S L ^[1]; Gilbert, M R ^[1]; Arakawa, K ^[2]; Mori, H ^[2]; Yao, Z ^[3]; Jenkins, M L ^[3]; Derlet, P M ^[4]

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1. EURATOM/CCFE Fusion Association, Culham Centre for Fusion Energy, Abingdon, Oxfordshire OX14 3DB (United Kingdom)
2. Research Center for Ultra-High Voltage Electron Microscopy, Osaka University, 7-1 Mihogaoka, Ibaraki, Osaka 567-0047 (Japan)
3. Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH (United Kingdom)
4. Condensed Matter Theory Group, Paul Scherrer Institut, CH-5232 Villigen PSI (Switzerland)

In situ real-time electron microscope observations of metals irradiated with ultrahigh-energy electrons or energetic ions show that the dynamics of microstructural evolution in these materials is strongly influenced by long-range elastic interactions between mobile nanoscale radiation defects. Treating long-range interactions is also necessary for modeling microstructures formed in ex situ high-dose-rate ion-beam irradiation experiments, and for interpolating the ion-beam irradiation data to the low-dose-rate limit characterizing the neutron irradiation environments of fission or fusion power plants. We show that simulations, performed using an algorithm where nanoscale radiation defects are treated as interacting Langevin particles, are able to match and explain the real-time dynamics of nanodefects observed in in situ electron microscope experiments.

• OSTI ID: 21386739
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 81, Issue 22; Other Information: DOI: 10.1103/PhysRevB.81.224107; (c) 2010 The American Physical Society; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALGORITHMS
CRYSTAL DEFECTS
DOSE RATES
ELECTRON BEAMS
ELECTRON MICROSCOPES
ELECTRONS
INTERACTION RANGE
INTERACTIONS
ION BEAMS
IRRADIATION
METALS
MICROSTRUCTURE
NANOSTRUCTURES
NEUTRONS
SIMULATION
TAIL IONS
BARYONS
BEAMS
CHARGED PARTICLES
CRYSTAL STRUCTURE
DISTANCE
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
HADRONS
IONS
LEPTON BEAMS
LEPTONS
MATHEMATICAL LOGIC
MICROSCOPES
NUCLEONS
PARTICLE BEAMS