Studies were made of the behavior of vacancies and dislocations in a bubble raft model of a crystal which was subjected to completely reversed cyclic shear. It was found that lattice vacancies tend to condense or collect to form the nucleus of a “crack” at a rate which depends on the amplitude of the reversed shear. Growth of the “crack” occurs when additional vacancies are transported to the nucleus by moving dislocations. A possible mechanism of fatigue of metal crystals is suggested in terms of the behavior of imperfections in the bubble model.
Publisher
Department of Theoretical and Applied Mechanics. College of Engineering. University of Illinois at Urbana-Champaign
Series/Report Name or Number
TAM R 86
1967-0382
ISSN
0073-5264
Type of Resource
text
Language
eng
Permalink
http://hdl.handle.net/2142/112628
Sponsor(s)/Grant Number(s)
Office of Naval Research, Department of the Navy, Contract No. N6ori-071(04), Project NR-031-005
Copyright and License Information
Copyright 1955 Board of Trustees of the University of Illinois
TAM technical reports include manuscripts intended for publication, theses judged to have general interest, notes prepared for short courses, symposia compiled from outstanding undergraduate projects, and reports prepared for research-sponsoring agencies.
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