Peculiarities of the rheological behavior and structure formation of aluminum under deformation at near-solidus temperatures / Smirnov A. S.,Konovalov A. V.,Belozerov G. A.,Shveikin V. P.,Smirnova E. O. // INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS. - 2016. - V. 23, l. 5. - P. 563-571.

ISSN/EISSN:

1674-4799 / 1869-103X

Type:

Article

Abstract:

This paper deals with a peculiar rheological behavior of aluminum at near-solidus temperatures. It has been experimentally established that there is an inverse strain rate dependence of strain resistance at temperatures ranging between 560 and 640A degrees D and strain rates ranging from 0.06 to 1.2 s(-1). Electron backscatter diffraction analysis has shown that at temperatures ranging between 540 and 640A degrees D and strain rates ranging from 0.06 to 0.1 s(-1), the main process of softening is dynamic polygonization, resulting in in situ recrystallization. At higher strain rates, ranging between 0.8 and 1.2 s(-1), and temperatures ranging between 560 and 640A degrees D, the recovery is dynamic. This unusual behavior of the mechanism of softening and the presence of the inverse strain rate dependence of strain resistance can be explained by blocking the motion of free dislocations by foreign atoms, which occurs at strain rates ranging between 0.06 and 0.1 s(-1). This process results in dislocation pile-up, thereby causing in situ recrystallization. At strain rates exceeding 0.16 s(-1), there is no intensive blocking of dislocations, leading to a direct strain rate dependence of strain resistance.

Author keywords:

aluminum; rheological behavior; formation; near-solidus temperature METAL-MATRIX COMPOSITES; HOT DEFORMATION; DYNAMIC RECRYSTALLIZATION; MICROSTRUCTURAL EVOLUTION; SERRATED FLOW; STRAIN-RATE; ALLOY; SUPERPLASTICITY; TEXTURE; MODEL

DOI:

10.1007/s12613-016-1267-3

Web of Science ID:

ISI:000376284500008

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	MAY
Publisher	SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013 USA
Language	English
EISSN	1869-103X
Keywords-Plus	METAL-MATRIX COMPOSITES; HOT DEFORMATION; DYNAMIC RECRYSTALLIZATION; MICROSTRUCTURAL EVOLUTION; SERRATED FLOW; STRAIN-RATE; ALLOY; SUPERPLASTICITY; TEXTURE; MODEL
Research-Areas	Materials Science; Metallurgy \& Metallurgical Engineering; Mining \& Mineral Processing
Web-of-Science-Categories	Materials Science, Multidisciplinary; Metallurgy \& Metallurgical Engineering; Mining \& Mineral Processing
Author-Email	smirnov@imach.uran.ru
ResearcherID-Numbers	Smirnov, Alexander/D-6194-2016 Konovalov, Anatoly/D-5617-2016
ORCID-Numbers	Smirnov, Alexander/0000-0002-5826-491X Konovalov, Anatoly/0000-0001-9131-8636
Funding-Acknowledgement	Russian Science Foundation {[}14-19-01358]
Funding-Text	The work was financially supported by Russian Science Foundation(No. 14-19-01358).
Number-of-Cited-References	49
Usage-Count-Last-180-days	3
Usage-Count-Since-2013	9
Journal-ISO	Int. J. Miner. Metall. Mater.
Doc-Delivery-Number	DM3ZE