Structural and phase transformations, mechanical properties, and shape-memory effects in quasibinary Ni50Ti38Hf12 alloy obtained by quenching from the melt / Pushin V. G.,Kuranova N. N.,Pushin A. V.,Uksusnikov A. N.,Kourov N. I.,Kuntsevich T. E. // PHYSICS OF METALS AND METALLOGRAPHY. - 2016. - V. 117, l. 12. - P. 1251-1260.

ISSN/EISSN:

0031-918X / 1555-6190

Type:

Article

Abstract:

Methods of transmission and scanning electron microscopy and chemical microanalysis, electron diffraction, and X-ray diffraction were used to systematically study the structure and the chemical and phase composition of the Ni50Ti38Hf12 alloy synthesized by rapid quenching from the melt and subjected to various heat treatments. The critical temperatures of the devitrification of the initially amorphous rapidly quenched alloy and the B2 a dagger{''} B19' thermoelastic martensitic transformations have been determined. The lattice parameters of the B2 austenite and thermoelastic B19' martensite have been measured. The main features of the formation of an ultrafine-grained structure in the alloy and the subsequent phase transformations (martensitic transformation and the decomposition with the formation of an intermetallic phase of the (Ti,Hf)(2)Ni type) have been studied depending on the regimes of heat treatment. Based on the results of measurements of mechanical properties upon tension (sigma(M), sigma(u), and delta) and the shape-memory effects (degree of shape recovery depending on the deformation by bending; and magnitude of the reversible strain epsilon(rev)), regimes for obtaining high-strength and plastic states of the alloy with a shape-memory effect have been established.

Author keywords:

rapid quenching from the melt; microstructure; ultrafine-grained state; mechanical properties SEVERE THERMOMECHANICAL TREATMENT; TINI-TICU ALLOYS; MARTENSITIC-TRANSFORMATION; NANOCRYSTALLINE STRUCTURE; MICROSTRUCTURE; RIBBONS

DOI:

10.1134/S0031918X16120127

Web of Science ID:

ISI:000390063000010

Соавторы в МНС:

Другие поля

Поле	Значение
Month	DEC
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
EISSN	1555-6190
Keywords-Plus	SEVERE THERMOMECHANICAL TREATMENT; TINI-TICU ALLOYS; MARTENSITIC-TRANSFORMATION; NANOCRYSTALLINE STRUCTURE; MICROSTRUCTURE; RIBBONS
Research-Areas	Metallurgy \& Metallurgical Engineering
Web-of-Science-Categories	Metallurgy \& Metallurgical Engineering
Author-Email	pushin@imp.uran.ru
ResearcherID-Numbers	Kuranova, Natalia/J-4368-2013 kourov, Nikolai/J-9421-2013 Uksusnikov, Alexey/J-5270-2013 Kuntsevich, Tatiana/J-4705-2013 Vladimir, Pushin/J-4807-2013
ORCID-Numbers	Kuranova, Natalia/0000-0002-5330-7909 kourov, Nikolai/0000-0002-6104-9102 Uksusnikov, Alexey/0000-0003-2551-8968 Kuntsevich, Tatiana/0000-0003-1793-6457 Vladimir, Pushin/0000-0001-7569-0999
Funding-Acknowledgement	Russian Scientific Foundation {[}15-12-10014]
Funding-Text	The work was supported by the grant of the Russian Scientific Foundation (project no. 15-12-10014). The X-ray diffractograms were obtained by T. E. Kuntsevich under the state task (theme ``Struktura,{''} no. 01201463331).
Number-of-Cited-References	29
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	10
Journal-ISO	Phys. Metals Metallogr.
Doc-Delivery-Number	EF1CP