Formation of Dislocations and Twins As a Result of Uniaxial Compression of Magnesium Single Crystals: Molecular Dynamics Simulation

Journal Article · Tue May 15 00:00:00 EDT 2018 · Crystallography Reports

DOI:https://doi.org/10.1134/S1063774518030318· OSTI ID:22758250

Nikonov, A. Yu. ^[1]

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1. Russian Academy of Sciences, Institute of Strength Physics and Materials Science, Siberian Branch (Russian Federation)

An atomistic simulation of the deformation of ideal magnesium crystal along the [112̄0] crystallographic axis has been performed. The evolution of structural defects under load at T = 300–350 K is considered in detail. It is established that the nucleation of dislocations in an ideal crystal occurs when the stress reaches a level of 0.1G (G is the shear modulus). The acting deformation modes are found to be prismatic slip of a dislocations and {101̄3} twinning. The formation of dislocation networks and dislocation sites in the twinning plane is observed. Some reactions are proposed to describe the dislocation evolution in the (3̄034) plane.

• OSTI ID: 22758250
• Journal Information: Crystallography Reports, Vol. 63, Issue 3; Other Information: Copyright (c) 2018 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7745
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPUTERIZED SIMULATION
CRYSTALLOGRAPHY
DEFECTS
DEFORMATION
DISLOCATIONS
MAGNESIUM
MOLECULAR DYNAMICS METHOD
MONOCRYSTALS
NUCLEATION
SHEAR
SLIP
STRESSES
TWINNING