Strength and Impact Toughness of Low-Carbon Steel with Fibrous Ultrafine-Grained Structure / Safarov I. M.,Korznikov A. V.,Galeev R. M.,Sergeev S. N.,Gladkovskii S. V.,Borodin E. M.,Pyshmintsev I. Yu. // PHYSICS OF METALS AND METALLOGRAPHY. - 2014. - V. 115, l. 3. - P. 295-302.

ISSN/EISSN:

0031-918X / 1555-6190

Type:

Article

Abstract:

The effect of severe warm rolling on the structure and mechanical characteristics of the 12GBA low-carbon steel has been studied. A fibrous ultrafine-grained structure has been formed; the average transverse size of structural elements was 0.5 mu m and the length of fibers in the longitudinal section was 20-25 mu m. An analysis of this ultrafine-grained structure in transverse and longitudinal sections was carried out using the method of electron backscatter diffraction. It has been shown that the formation of the fibrous structure results in a twofold increase in the strength of the steel in comparison with the original coarse-grained state, with retaining satisfactory ductility. The additional annealing of the steel leads to a slight decrease in its strength characteristics, but results in the complete restoration of its ductile characteristics to the values typical of the coarse-grained state. Impact tests at negative temperatures have shown that, after rolling, the cold-brittleness threshold shifts toward a lower temperature range (from -30 to -60 degrees C) in comparison with the coarse-grained state. It has been found that the formation of the ultrafine-grained state leads to a decrease in the cold-brittleness threshold of the 12GBA steel, as well as to an increase in its impact toughness in the low-temperature range and in the contribution of the crack-propagation work to the total work of fracture of a specimen.

Author keywords:

ultrafine-grained materials; low-carbon steel; impact toughness; ductile-brittle transition STATE

DOI:

10.1134/S0031918X14030107

Web of Science ID:

ISI:000335681500010

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	MAR
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
EISSN	1555-6190
Keywords-Plus	STATE
Research-Areas	Metallurgy \& Metallurgical Engineering
Web-of-Science-Categories	Metallurgy \& Metallurgical Engineering
Author-Email	ilfat@anrb.ru
ResearcherID-Numbers	Gladkovsky, Sergei/E-5731-2016 Korznikov, Alexander/F-1473-2014
ORCID-Numbers	Gladkovsky, Sergei/0000-0002-3542-6242
Funding-Acknowledgement	Presidium of the Russian Academy of Sciences {[}25]; joint project of Ural Branch {[}12-C-1-1030]; Siberian Branch of the Russian Academy of Sciences
Funding-Text	This work was supported in part by the Program no. 25 of the Presidium of the Russian Academy of Sciences, as well as by the joint project (no. 12-C-1-1030) of the Ural Branch and the Siberian Branch of the Russian Academy of Sciences, using the equipment of the Plastometry Center of Collaborative Access, Ural Branch, Russian Academy of Sciences.
Number-of-Cited-References	16
Usage-Count-Last-180-days	2
Usage-Count-Since-2013	14
Journal-ISO	Phys. Metals Metallogr.
Doc-Delivery-Number	AG8PU