Effect of heat treatment on structural and phase transformations in the Ti49.5Ni50.5 alloy amorphized by high-pressure torsion / Pushin V. G.,Kuranova N. N.,Kourov N. I.,Valiev R. Z.,Korolev A. V.,Makarov V. V.,Pushin A. V.,Uksusnikov A. N. // PHYSICS OF METALS AND METALLOGRAPHY. - 2013. - V. 114, l. 6. - P. 488-502.

ISSN/EISSN:

0031-918X / нет данных

Type:

Article

Abstract:

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 similar to 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 mu m). 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.

Author keywords:

martensitic transformations; structural and phase transformations; titanium nickelide (TiNi); shape-memory effect SEVERE PLASTIC-DEFORMATION; SHAPE-MEMORY ALLOYS; TITANIUM NICKELIDE; TINI ALLOY; BEHAVIOR

DOI:

10.1134/S0031918X13060124

Web of Science ID:

ISI:000320406400005

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JUN
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
Keywords-Plus	SEVERE PLASTIC-DEFORMATION; SHAPE-MEMORY ALLOYS; TITANIUM NICKELIDE; TINI ALLOY; BEHAVIOR
Research-Areas	Metallurgy \& Metallurgical Engineering
Web-of-Science-Categories	Metallurgy \& Metallurgical Engineering
Author-Email	pushin@imp.uran.ru
ResearcherID-Numbers	Uksusnikov, Alexey/J-5270-2013 Vladimir, Pushin/J-4807-2013 Alexander, Korolev/K-3036-2013 Kuranova, Natalia/J-4368-2013 kourov, Nikolai/J-9421-2013
ORCID-Numbers	Uksusnikov, Alexey/0000-0003-2551-8968 Vladimir, Pushin/0000-0001-7569-0999 Alexander, Korolev/0000-0002-5104-3997 Kuranova, Natalia/0000-0002-5330-7909 kourov, Nikolai/0000-0002-6104-9102
Funding-Acknowledgement	Presidium of the Russian Academy of Sciences {[}12-P-2-1060]; Presidium of the Ural Branch of the Russian Academy of Science {[}12-2-005-Arktika, 12-2-007-DMU]; Russian Foundation for Basic Research {[}11-02-00021]
Funding-Text	This work was supported in part by the Presidium of the Russian Academy of Sciences (project no. 12-P-2-1060), by the Presidium of the Ural Branch of the Russian Academy of Science (projects nos. 12-2-005-Arktika, 12-2-007-DMU) and by the Russian Foundation for Basic Research (project no. 11-02-00021).
Number-of-Cited-References	30
Usage-Count-Since-2013	15
Journal-ISO	Phys. Metals Metallogr.
Doc-Delivery-Number	164JX