New mechanism of defect production in metals: A molecular-dynamics study of interstitial-dislocation-loop formation in high-energy displacement cascades

Journal Article · Mon May 27 04:00:00 EDT 1991 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.66.2766· OSTI ID:5691933

Guinan, M W ^[1]

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1. University of California, Lawrence Livermore National Laboratory, L-644, Livermore, California 94550 (USA)

We present molecular-dynamics computer-simulation studies of 25-keV displacement cascades in Cu at low temperature. We observe the splitting of a cascade into subcascades and for the first time show by molecular dynamics that cascades in metals may lead to the formation of both vacancy and interstitial dislocation loops. We propose a new mechanism of defect production based on interstitial prismatic dislocation-loop formation and discuss its consequences regarding the primary state of damage in irradiated metals.

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5691933
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 66:21; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360106* -- Metals & Alloys-- Radiation Effects
COMPUTERIZED SIMULATION
COPPER
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DATA
DYNAMICS
ELEMENTS
ENERGY RANGE
INFORMATION
KEV RANGE
KEV RANGE 10-100
MECHANICS
METALS
MOLECULES
NUMERICAL DATA
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
SIMULATION
TEMPERATURE DEPENDENCE
THEORETICAL DATA
TIME DEPENDENCE
TRANSITION ELEMENTS
ULTRALOW TEMPERATURE