Molecular Dynamics Simulation of the Edge Dislocation Glide in Nickel and Silver in the Presence of Interstitial Light Element Atoms

The edge dislocation glide velocity in fcc metals (nickel, silver) is studied at various temperatures, tangential stresses, and contents of interstitial atoms of light elements (carbon, nitrogen, oxygen) by molecular dynamics simulation. The glide velocity of partial dislocations in pure metals decr...

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Bibliographic Details
Published in:Russian metallurgy Metally 2020-04, Vol.2020 (4), p.271-276
Main Authors: Poletaev, G. M., Zorya, I. V., Starostenkov, M. D., Bebikhov, Yu. V., Rakitin, R. Yu
Format: Article
Language:English
Subjects:
Chemistry and Materials Science
Edge dislocations
Lattice parameters
Light elements
Materials Science
Metallic Materials
Molecular dynamics
Nickel
Physical Foundations of Strength and Plasticity
Silver
Stresses
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Summary:The edge dislocation glide velocity in fcc metals (nickel, silver) is studied at various temperatures, tangential stresses, and contents of interstitial atoms of light elements (carbon, nitrogen, oxygen) by molecular dynamics simulation. The glide velocity of partial dislocations in pure metals decreases with increasing temperature at low tangential stresses (~10 MPa) and increases at relatively high tangential stresses (~10 2 MPa or higher). The introduction of interstitial atoms retards dislocation glide. This effect is more pronounced in nickel than in silver, which is mainly due to the difference in the lattice parameters: the lattice parameter of nickel is smaller than that of silver.
ISSN:0036-0295
1555-6255
1531-8648
DOI:10.1134/S0036029520040217