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Abstract
Based on the observation of antiphase-boundary (APB) tubes connected to mixed superdislocations in Ni3Al, the hypothesis that APB tubes are trailed behind moving kinks is explored. Evidence is given to show that APB tubes originate in particular at the junction between a kink and a Kear-Wilsdorf lock. The mechanism proposed here for the formation of APB tubes involves the local relaxation by short-range athermal climb motion of the connecting jog; once this is achieved, a straight APB tube is trailed conservatively by the moving kink.