Specific features of cast high-entropy AlCrFeCoNiCu alloys produced by ultrarapid quenching from the melt / Ivchenko M. V.,Pushin V. G.,Uksusnikov A. N.,Wanderka N.,Kourov N. I. // PHYSICS OF METALS AND METALLOGRAPHY. - 2013. - V. 114, l. 6. - P. 503-513.

ISSN/EISSN:

0031-918X / нет данных

Type:

Article

Abstract:

Results of studying structural and phase transformations that occur in the cast high-entropy equiatomic AlCrFeCoNiCu alloy after ultrarapid quenching from the melt in an inert atmosphere (RQM) and various isothermal treatments are presented for the first time. The investigations have been performed using analytical, transmission and scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffraction structure and phase analyses, as well as measurements of the nanohardness, microhardness, and elastic moduli. It has been found that an ultrafine-grained structure is formed in this alloy during RQM. Already during quenching and, especially, during subsequent annealing, the alloy undergoes decomposition, which is accompanied by the precipitation in the bcc (B2) matrix of some nanosized phases, predominantly of equiaxed morphology, both atomically ordered (B2) and disordered (A2), with various chemical compositions. All nanophases are multicomponent solid solutions and are enriched in a few elements, which leads to a pronounced nanomodulation of the elemental and phase compositions over the alloy bulk, identified, in particular, from the presence of satellites in the vicinity of some reflections in selected-area electron diffraction patterns.

Author keywords:

high-entropy equiatomic alloy; ultrarapid quenching; entropy of mixing; spinodal decomposition; structural and phase transformations; nanophases; chemical composition MICROSTRUCTURE; SYSTEM; STATES; MEMORY

DOI:

10.1134/S0031918X13060057

Web of Science ID:

ISI:000320406400006

Соавторы в МНС:

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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	MICROSTRUCTURE; SYSTEM; STATES; MEMORY
Research-Areas	Metallurgy \& Metallurgical Engineering
Web-of-Science-Categories	Metallurgy \& Metallurgical Engineering
Author-Email	MVIvchenko@yandex.ru
ResearcherID-Numbers	Vladimir, Pushin/J-4807-2013 Uksusnikov, Alexey/J-5270-2013 kourov, Nikolai/J-9421-2013 Ivchenko, Mikhail/J-4722-2013
ORCID-Numbers	Vladimir, Pushin/0000-0001-7569-0999 Uksusnikov, Alexey/0000-0003-2551-8968 kourov, Nikolai/0000-0002-6104-9102 Ivchenko, Mikhail/0000-0001-7528-9695
Funding-Acknowledgement	Presidium of the Russian Academy of Sciences {[}12-I-2-2031]; Ural Branch of the Russian Academy of Sciences {[}12-M-235-2063]
Funding-Text	The work was supported in part by budget projects of the Presidium of the Russian Academy of Sciences (no. 12-I-2-2031) and the Ural Branch of the Russian Academy of Sciences (no. 12-M-235-2063).
Number-of-Cited-References	24
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	27
Journal-ISO	Phys. Metals Metallogr.
Doc-Delivery-Number	164JX