Study on the applicability of the Friedel relation with dislocation velocity-stress exponent

Abstract

It was investigated at 77–178 K whether the Friedel relation is appropriate for the interaction between a dislocation and the impurity in KCl:Mg2+ (0.035 mol% in the melt) single crystal. This was carried out by fitting of me=0 to the temperature versus dislocation velocity-effective stress exponent, m*, curves with respect to the two models: one is the Fleischer's model taking account of the Friedel relation and the other the Fleischer's model. The former model is termed the F-F. me=0 is the m value at zero strain. m is a dislocation velocity-applied stress exponent. The m* for the F-F was examined from