Abstract
The nature of double cross slip of screw dislocations as induced by a locked parallel screw dislocation, that of edge dislocations as induced by a locked edge dislocation through climb, and that of the cross climb of edge dislocations as induced by another edge dislocation through slip are studied in the light of the interaction of the mutual stress fields of the dislocations. Some quantitative calculations of the multiplication of a single loop and of the growth of slip bands in LiF are given; it is found that agreement with the experimental results of Johnston and Gilman [W. G. Johnston and J. J. Gilman, J. Appl. Phys. 30, 129 (1959); 31, 687 (1960)] is satisfactory. A mechanism for linear hardening at low stresses is suggested.
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