Abstract

The models of dislocation generation during plastic deformation are reviewed. The different types of dislocation generation, i.e. localized Frank–Read sources and multiplication by the double-cross slip mechanism, are observed in ceramic single crystals, semiconductors, metals, intermetallics and quasicrystals during in situ deformation in a high-voltage electron microscope. The results are discussed with respect to the ability of cross slip in different materials.

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