naa a22 4500 510815332 CHVBK 20180411083504.0 cr unu---uuuuu 180411e20130801xx s 000 0 eng 10.1134/S0031918X13060136 doi (NATIONALLICENCE)springer-10.1134/S0031918X13060136 Effect of deviations of composition from the quasi-binary section TiNi-TiCu on structural and phase transformations in rapidly quenched alloys [Elektronische Daten] [A. Pushin, A. Popov, V. Pushin] Methods of X-ray diffraction, transmission and scanning electron microscopy, and selected-area electron diffraction (SAED) have been used to study the phase and elemental composition and structure of alloys close to the stoichiometric Ti50Ni25Cu25 alloy. Based on the method of rapid quenching of the melt (free-jet melt spinning), alloys of the quasi-binary TiNi-TiCu section have been prepared, which in the initial as-cast state exhibited the thermoelastic martensitic transformations B 2 ↔ B 19 and related shape-memory effects. The chemical composition of the Ti50 + x Ni25Cu25 − x alloys was varied by changing titanium and copper concentrations within x ≤ ±1 at % (from Ti49Ni25Cu26 to Ti51Ni25Cu24). It has been established that quenching at a cooling rate equal to 106 K/s leads to the amorphization of all the alloys under consideration. Heating to 723 K and higher leads to the devitrification of the alloy with the formation of a nanocrystalline or submicrocrystalline structure of the B2 austenite. The mechanical properties of these alloys have been measured in the initial amorphous state and in the polycrystalline martensitic state. It has been shown that, depending on the extent of the deviations of the alloy composition from the stoichiometry, which cause the decomposition of the alloys in the process of nanocrystallization, regular changes are observed in their mechanical properties and in the shape-memory effects. The kinetics of the processes of the devitrification of the alloys, as well of the forward and reverse martensitic transformations, have been studied, their characteristic temperatures have been determined, and a diagram of the dependence of the characteristic temperatures on the chemical composition of the alloys has been constructed. Pleiades Publishing, Ltd., 2013 Ti2NiCu-based alloys (Ti50Ni25Cu25) nationallicence rapid quenching of alloys by free-jet melt spinning nationallicence nanocrystals nationallicence thermoelastic martensitic transformations nationallicence shape-memory effects nationallicence Pushin A. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, 620990, Ekaterinburg, Russia aut Popov A. The First President of Russia B. N. Yeltsin Ural Federal University (UrFU), ul. Mira 28, 620002, Ekaterinburg, Russia aut Pushin V. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, 620990, Ekaterinburg, Russia aut The Physics of Metals and Metallography Springer US; http://www.springer-ny.com 114/8(2013-08-01), 692-702 0031-918X 114:8<692 2013 114 11508 https://doi.org/10.1134/S0031918X13060136 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S0031918X13060136 text/html Onlinezugriff via DOI 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- Popov A. The First President of Russia B. N. Yeltsin Ural Federal University (UrFU), ul. Mira 28, 620002, Ekaterinburg, Russia aut NATIONALLICENCE 700 1- Pushin V. 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 Springer US; http://www.springer-ny.com 114/8(2013-08-01), 692-702 0031-918X 114:8<692 2013 114 11508 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer