Influence of Carbon and Oxygen Impurities on Migration Velocity of Grain-boundary Triple Junctions in FCC Metals

Using molecular dynamics simulation, this paper studies the influence of impurity atoms of carbon and oxygen on the migration velocity of triple junctions of grain boundaries created by misorientations about axis in Ni, Ag, Al metals with the face-centered cubic crystal system. It is shown that the...

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Bibliographic Details
Published in:Russian physics journal 2020-02, Vol.62 (10), p.1840-1845
Main Authors: Poletaev, G. M., Zorya, I. V., Rakitin, R. Yu, Semenov, A. S., Starostenkov, M. D.
Format: Article
Language:English
Subjects:
Aluminum
Binding energy
Carbon
Condensed Matter Physics
Degassing of metals
Force and energy
Grain boundaries
Hadrons
Heavy Ions
Impurities
Lasers
Light elements
Mathematical and Computational Physics
Metals
Molecular dynamics
Nickel
Nuclear Physics
Optical Devices
Optics
Oxygen atoms
Photonics
Physics
Physics and Astronomy
Silver
Theoretical
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Summary:Using molecular dynamics simulation, this paper studies the influence of impurity atoms of carbon and oxygen on the migration velocity of triple junctions of grain boundaries created by misorientations about axis in Ni, Ag, Al metals with the face-centered cubic crystal system. It is shown that the addition of impurity atoms of light elements substantially constrains the triple junctions from migration. Carbon atoms tend to create clusters which become effective locks when fixed at the grain boundaries, thereby preventing their migration. Oxygen atoms do not form aggregates, but due to high values of the binding energy between atoms and grain boundaries, they effectively inhibit their migration. Binding energies between carbon and oxygen atoms and grain boundary dislocations are calculated in metals at issue. The obtained results correlate with the dependencies between the migration velocity of the triple junctions and the impurity concentration.
ISSN:1064-8887
1573-9228
DOI:10.1007/s11182-020-01914-x