Abstract
Abstract Electron microscope images of superlattice dislocations taken with g·b>2 can give rise to multiple image peaks whose position and separation are not necessarily directly related to dislocation dissociation schemes. This was proved by image simulations and is consistent with the results of the kinematical theory of image formation. A study of the separation widths of dissociated superlattice dislocations in Ni3(Al, Ti) was made using g·b = 4 and 8 and large |s|. Dissociation widths were determined to be in the range 3 nm 370mJm−2
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