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Effects of the dislocation collective behaviour in plasticity of single crystals
Author(s) -
Bengus V. Z.
Publication year - 1984
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170190604
Subject(s) - dislocation , condensed matter physics , sign (mathematics) , materials science , relaxation (psychology) , peierls stress , stress field , constant (computer programming) , plasticity , stress relaxation , shear stress , shear (geology) , stress (linguistics) , dislocation creep , mechanics , physics , thermodynamics , composite material , creep , mathematics , psychology , mathematical analysis , social psychology , linguistics , philosophy , finite element method , computer science , programming language
An analysis has been carried out of the motion of a pair of sign‐similar edge dislocations under a constant shear stress in a simplest nonuniform field of internal stresses τ i with a constant gradient. The influence is shown of the dislocation interaction and τ i on the activation „volume” of the average velocity of a dislocation pair, which is measured by the flow stress relaxation. The experimentally revealed anomalies of the activation „volume” measured by the flow stress relaxation are regarded as corroborating the analysis and as manifestations of the collective effects of the elastic interaction of sign‐similar mobile dislocations.