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Dislocation Multiplication as a Controlling Factor of Work‐Hardening
Author(s) -
Bengus V. Z.,
Komnik S. N.,
Shtitelman O. B.
Publication year - 1966
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.19660140121
Subject(s) - work hardening , dislocation , hardening (computing) , materials science , softening , multiplication (music) , strain hardening exponent , frank read source , work (physics) , crystallography , dislocation creep , deformation (meteorology) , composite material , mathematics , physics , chemistry , thermodynamics , microstructure , combinatorics , layer (electronics)
The dislocations responsible for defective structure in a KCl crystal are not only obstacles but also “sources” of multiplication for moving dislocations. It is shown that the process of multiplication of moving dislocations controls the work‐hardening of a crystal in the easy glide stage. The plastic deformation of a crystal is accompanied by repeated yield points arising from the discrete nature of dislocation multiplication. It is found that work‐softening (similar to stage III work‐hardening in f.c.c. metals) can occur in the plastic deformation of KCl crystals. In the discussion the concept about the controlling role of multiplication of moving dislocations is given as an alternative to the other point of view, which considers the work‐hardening process to be controlled by the resistance to dislocation motion.