STRUCTURE OF A NI3AL SINGLE CRYSTAL AFTER SEVERE PLASTIC DEFORMATION
O. A. Kuts1, S. V. Starenchenko1, Yu. V. Solov'eva1, V. A. Starenchenko1, V. P. Pilyugin2, A. I. Ancharov3,4
1Tomsk State University of Architecture and Building, 634003, Tomsk, pl. Salt, 2
2Mikheev Institute of Metal Physics Ural Branch, Russian Academy of Sciences, ul. Sof'i Kovalevskoi 18, Ekaterinburg, 620108 Russia
3Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences, ul. Kutateladze 18, Novosibirsk, 630128 Russia
4Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences, prosp. Akademika Lavrent'eva 11, Novosibirsk, 630090 Russia
Keywords: монокристалл, сверхструктура L1, сверхдислокация, дальний порядок, синхротронное излучение, single crystal, L1 superstructure, overdislocation, long-range order, synchrotron radiation
Abstract
Synchrotron X-ray diffraction study of Ni3Al single crystals ordered in the L12 structure was performed. The ultrafine grained structure resulting from severe plastic deformation was studied. In the initial state, the ordered single crystal is oriented along the compression axis [211]. Along with the ordered phase, there is a small proportion of disordered crystal oriented along the [100] axis. Compression of the samples and subsequent torsion at different angles led to a destruction of the single crystal state of the sample and a changed in the state of the atomic order, up to the disappearance of the L12 superstructure.
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