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Influence of Internal Stress on Thermally Activated Dislocation Motion in the Peierls Potential
Author(s) -
Heinrich R.,
Pompe W.
Publication year - 1970
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.19700400210
Subject(s) - dislocation , peierls stress , materials science , condensed matter physics , stress (linguistics) , internal stress , flow stress , strain rate , homogeneous , motion (physics) , mechanics , thermodynamics , physics , classical mechanics , dislocation creep , composite material , linguistics , philosophy
An investigation is made of the dependence of thermally activated motion of dislocations in the Peierls potential on internal stresses. In order to compute the mean strain rate the totality of these stresses is taken into account assuming a homogeneous or an inhomogeneous distribution of dislocations. It is found that the increase of the activation volume in the small stress range can be explained. The consequences of this theory with respect to the dependence of flow stress on temperature are discussed.