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Contribution Poster

X-ray structural analysis

Order-disorder phase transition and amorphous phase formation in superlocalized shear bands of Ni3Ge single crystals

Speakers

  • Prof. Yulia SOLOV'EVA

Primary authors

Co-authors

Content

The loss of stability of the homogenous plastic deformation of single crystal specimens of the Ni3Ge alloy was investigated under uniaxial constant-rate compressive loading. A phenomenon of high temperature strain superlocalization was observed. Plastic deformation in this case occurred in a band a few tens of microns wide, reaching the values of hundreds of percent. Using synchrotron radiation it was shown that the phenomenon of strain superlocalization is associated with the formation of polycrystalline substructure in the strain localization band. Order-disorder phase transition and amorphous phase formation in superlocalized shear bands were revealed. This work was supported by the Russian Foundation for Basic Research (project No. 16-03-00182-a). X-ray synchrotron measurements were carried out at the experimental station Diffractometry in the “Hard” X-ray Range at the Center of Collaborative Access of the Siberian Synchrotron and Terahertz Radiation Center, Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk.