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The Contribution of the Dislocation Forest to the Flow Stress
Author(s) -
Schoeck G.,
Frydman R.
Publication year - 1972
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.2220530227
Subject(s) - dislocation , tree (set theory) , orientation (vector space) , contrast (vision) , stress (linguistics) , line (geometry) , energy (signal processing) , materials science , condensed matter physics , geometry , crystallography , physics , mathematics , combinatorics , chemistry , optics , statistics , linguistics , philosophy
The formation of junctions between a moving dislocation and the trees of a dislocation forest has been calculated for f.c.c. crystals. In contrast to previous estimates the concept of the orientation‐dependent line energy and a more realistic averaging procedure was used. In a random forest in which the tree length is equal to the tree separation only about 20% of the trees form junctions. The stress to overcome the junctions is higher for screw dislocations than for edges but the exact values depend on the nature of the forest.