Macroscopic localization of plastic deformation in single crystals Ni3Ge with L12 superstructure

The dislocation structure forming in the single crystal Ni3Ge alloy during the deformation is studied in this paper. It is established that plastic deformation leads to the uniform strain stability loss in the Ni3Ge alloy at increasing the temperature. The homogeneous dislocation structure loses its stability in local places, which are situated close to the zone of localization. The internal structure of the localization band of deformation consists of cleaned from dislocations fragments in size about 1μm that are disorientated from each other to 10-600. Then the polycrystalline local band is formed, in which the plastic deformation reaches hundreds of percents.