MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Activation Free Energy of Nucleation of a Dislocation Pair in Magnesium
Masayuki UranagaseSana KamigakiRyosuke MatsumotoNoriyuki Miyazaki
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2013 Volume 54 Issue 5 Pages 680-685

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Abstract

Kink deformation is one of the possible principal deformation modes of alloys with a long-period stacking ordered structure under compression parallel to the basal plane. In this deformation, dislocation pairs are massively nucleated, and these dislocations align in a line to form kink bands. In this study, we investigated the nucleation of a dislocation pair in a pure magnesium single crystal by molecular dynamics simulations. We also evaluated the activation free energy of nucleation of a dislocation pair and investigated the dependence of the activation free energy on the applied shear stress and temperature.

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© 2013 The Japan Institute of Metals and Materials
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