naa a22 4500 510814603 CHVBK 20180411083459.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.1134/S0031918X13060124 doi (NATIONALLICENCE)springer-10.1134/S0031918X13060124 Effect of heat treatment on structural and phase transformations in the Ti49.5Ni50.5 alloy amorphized by high-pressure torsion [Elektronische Daten] [V. Pushin, N. Kuranova, N. Kourov, R. Valiev, A. Korolev, V. Makarov, A. Pushin, A. Uksusnikov] Results are presented for a study of the structural and phase transformations that occur in the titanium-nickelide shape-memory alloy Ti49.5Ni50.5 subjected to heat treatment after deformation-induced amorphization by megaplastic high-pressure torsion (HPT) using five or ten revolutions of Bridgman anvils. The investigations were performed using transmission and scanning electron microscopy, X-ray diffraction, and measurements of the temperature dependences of electrical resistivity and magnetic susceptibility. It has been established that the crystallization of the alloy already occurs upon low-temperature treatment, beginning with ∼500 K. The evolution of the structure and the stage character of the development of crystallization and recrystallization processes depending on temperature have been determined. It has been shown that the annealing of the amorphized alloy makes it possible to obtain highly homogeneous nanostructured, submicrocrystalline, or bimodal states in the B2 austenite. A complete diagram of thermoelastic martensitic transformations of the B2 austenite has been constructed in the region from a nanostructured to a conventional polycrystalline state (with a grain size of 20-50 μm). The effect of size on the stabilization of austenite has been revealed and its specific features have been studied for the B2 → R and B2(R) → B19′ martensitic transformations depending on the structural state of the alloy. Pleiades Publishing, Ltd., 2013 martensitic transformations nationallicence structural and phase transformations nationallicence titanium nickelide (TiNi) nationallicence shape-memory effect nationallicence Pushin V. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, 620990, Ekaterinburg, Russia aut Kuranova N. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, 620990, Ekaterinburg, Russia aut Kourov N. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, 620990, Ekaterinburg, Russia aut Valiev R. Institute of Physics of Advanced Materials, ul. K. Marksa 12, 450000, Ufa, Russia aut Korolev A. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, 620990, Ekaterinburg, Russia aut Makarov V. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, 620990, Ekaterinburg, Russia aut Pushin A. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, 620990, Ekaterinburg, Russia aut Uksusnikov A. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, 620990, Ekaterinburg, Russia aut The Physics of Metals and Metallography SP MAIK Nauka/Interperiodica 114/6(2013-06-01), 488-502 0031-918X 114:6<488 2013 114 11508 https://doi.org/10.1134/S0031918X13060124 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S0031918X13060124 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pushin V. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, 620990, Ekaterinburg, Russia aut NATIONALLICENCE 700 1- Kuranova N. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, 620990, Ekaterinburg, Russia aut NATIONALLICENCE 700 1- Kourov N. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, 620990, Ekaterinburg, Russia aut NATIONALLICENCE 700 1- Valiev R. Institute of Physics of Advanced Materials, ul. K. Marksa 12, 450000, Ufa, Russia aut NATIONALLICENCE 700 1- Korolev A. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, 620990, Ekaterinburg, Russia aut NATIONALLICENCE 700 1- Makarov V. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, 620990, Ekaterinburg, Russia aut NATIONALLICENCE 700 1- Pushin A. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, 620990, Ekaterinburg, Russia aut NATIONALLICENCE 700 1- Uksusnikov A. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, 620990, Ekaterinburg, Russia aut NATIONALLICENCE 773 0- The Physics of Metals and Metallography SP MAIK Nauka/Interperiodica 114/6(2013-06-01), 488-502 0031-918X 114:6<488 2013 114 11508 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer