Phase and structural transformations in the Ti49.5Ni50.5 alloy with a shape-memory effect during torsion under high pressure / Pushin V. G.,Valiev R. Z.,Valiev E. Z.,Kourov N. I.,Kuranova N. N.,Makarov V. V.,Pushin A. V.,Uksusnikov A. N. // PHYSICS OF METALS AND METALLOGRAPHY. - 2012. - V. 113, l. 3. - P. 256-270.

ISSN/EISSN:

0031-918X / нет данных

Type:

Article

Abstract:

Results of investigations of structural and phase transformations that occur in the titanium-nickelide-based alloy Ti49.5Ni50.5 with a shape memory effect during severe plastic deformation by torsion under high pressure (HPT) are reported. The studies were performed using transmission and scanning electron microscopy, neutron and X-ray diffraction, and measurements of temperature dependences of electrical resistivity. The martensitic B2 -> B19' transformation was found to be induced in the alloy when applying a high pressure. After unloading, the martensitic B19' phase is retained in the alloy. The fine structure of the B19' martensite and its evolution into nanocrystalline and, subsequently, amorphous state during HPT with 1/4, 1/2, 1, 5, and 10 rev have been studied. It was shown that, after HPT, all nanosized crystallites whose sizes are less than 30-50 nm have a B2-type structure and, therefore, the reverse martensitic B19' -> B2 transformation is realized in the alloy at room temperature after unloading.

Author keywords:

SEVERE PLASTIC-DEFORMATION; NICKELIDE-BASED ALLOYS; TITANIUM NICKELIDE; TINI ALLOY; BEHAVIOR; HEAT

DOI:

10.1134/S0031918X12030118

Web of Science ID:

ISI:000301608900007

Соавторы в МНС:

Другие поля

Поле	Значение
Month	MAR
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
Keywords-Plus	SEVERE PLASTIC-DEFORMATION; NICKELIDE-BASED ALLOYS; TITANIUM NICKELIDE; TINI ALLOY; BEHAVIOR; HEAT
Research-Areas	Metallurgy \& Metallurgical Engineering
Web-of-Science-Categories	Metallurgy \& Metallurgical Engineering
ResearcherID-Numbers	kourov, Nikolai/J-9421-2013 valiev, eduard/J-9337-2013 Vladimir, Pushin/J-4807-2013 Kuranova, Natalia/J-4368-2013 Uksusnikov, Alexey/J-5270-2013
ORCID-Numbers	kourov, Nikolai/0000-0002-6104-9102 valiev, eduard/0000-0002-0760-0370 Vladimir, Pushin/0000-0001-7569-0999 Kuranova, Natalia/0000-0002-5330-7909 Uksusnikov, Alexey/0000-0003-2551-8968
Funding-Acknowledgement	Russian Foundation for Basic Research {[}11-02-00021]; Russian Academy of Sciences; Ural Branch of Russian Academy of Sciences
Funding-Text	This work was supported in part by the Russian Foundation for Basic Research (project no. 11-02-00021) and by the Russian Academy of Sciences and Ural Branch of Russian Academy of Sciences (project for young scientists).
Number-of-Cited-References	37
Usage-Count-Since-2013	11
Journal-ISO	Phys. Metals Metallogr.
Doc-Delivery-Number	910AF