faulting in ßCuPd in prestrain-induced transformation stage

Changes of microstructure and electrical resistivity of ordered Cu-40Pd (at.%) alloy under severe plastic deformation

“…In this case, the reciprocal lattice cross-section was {110}, the streaks were directed along <112], and they were split at the <110> and <002> nodes. Analogous results were obtained in [15] where the diffuse scattering was interpreted as a criterion of the B2 lattice instability. It was supposed that this instability was due to the formation of an antiphase surface between paired dislocations.…”

“…Besides, paper [16] does not report detailed data on the fine structure of dislocations upon deformation, while the knowledge of this structure is necessary to determine levels of stability, metastability or instability of the B2 phase. The available data concerning the effect of plastic deformation on the ordered CuePd alloy suggest the dependence of the order-disorder phase transition on the degree and the type of the deformation treatment [10,15]. For example, only initial stages of the phase transformation were observed after compression deformation or rolling, whereas almost complete disordering took place after filing of the powder [10].…”