Further comments on the appropriateness of stacking fault energy - to - mechanical property correlations

Abstract

Since most of the work of constricting an extended dislocation is done near the final separation, changes in the required separation (or core width) for reaction will cause large changes in the total work of constriction. This effect may distort any correlation between mechanical properties and stacking fault energy. Atomistic modeling of the appropriate processes is probably the most effective method for the determination of the work of constriction, which is the parameter of fundamental importance for dislocation glide processes. Stacking fault energy or partial separation distance should be regarded as merely qualitative parameters in this regard.