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X-ray structural analysis

X-ray diffraction study of the structure of single crystals of Ni3Al alloy using synchrotron radiation after intense plastic deformation

Speakers

  • Olga KUTS

Primary authors

  • Olga KUTS (Tomsk State University of Architecture and Building)

Co-authors

Content

X-ray analysis has been applied for the study of the ultrafine-grained structure as a result of intense deformation in crystals Ni3Al alloy ordered by the L12 type using synchrotron radiation. In the initial state the material under study is in the single crystal ordered state and is oriented along the compression axis [211]. It should be noted that along with the ordered phase there is a small fraction of the disordered crystal oriented along the [100] axis. Compression of samples in Bridgman anvils and subsequent twisting at different angles has led to a change in their structural state. After compression between anvils and at reaching an average quasi-hydrostatic pressure of 8.0 GPa, the material changes in single-crystal structure to fragmented state. In addition to large crystalline fragments, submicrocrystalline disoriented regions appear. 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.