Abstract
A systematic combined study of crystal lattice distortions caused by doping and by severe plastic deformation (SPD) of Ti- and Nb-doped Ni3Al intermetallic compound has been carried out using methods of X-ray diffraction, electron microscopy, and electrical-resistance measurements. The degree of imperfection of the alloys has been estimated based on the results obtained by all three methods. The degree of structural perfection of niobium-doped crystals was found to be higher than in the case of Ti doping. The character of stresses (tensile stresses after doping; and compressive stresses after SPD) in the crystal lattice has been established and their values have been calculated. A significant increase in the density of dislocations, point defects, and lattice curvature has been found after SPD. A nanocrystalline structure is formed in these alloys, but no complete disordering of the intermetallic phase is observed.
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Original Russian Text © N.V. Kazantseva, V.P. Pilyugin, S.E. Danilov, V.Yu. Kolosov, 2015, published in Fizika Metallov i Metallovedenie, 2015, Vol. 116, No. 5, pp. 530–537.
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Kazantseva, N.V., Pilyugin, V.P., Danilov, S.E. et al. Effect of severe plastic deformation on the structure and crystal-lattice distortions in the Ni3(Al,X) (X = Ti, Nb) intermetallic compound. Phys. Metals Metallogr. 116, 501–508 (2015). https://doi.org/10.1134/S0031918X15050075
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DOI: https://doi.org/10.1134/S0031918X15050075