Influence of Prolonged Heating on Thermal Softening, Chemical Composition, and Evolution of the Nanocrystalline Structure Formed in Quenched High-Carbon Steel upon Friction Treatment / Makarov A. V.,Korshunov L. G.,Savrai R. A.,Davydova N. A.,Malygina I. Yu.,Chernenko N. L. // PHYSICS OF METALS AND METALLOGRAPHY. - 2014. - V. 115, l. 3. - P. 303-314.

ISSN/EISSN:

0031-918X / 1555-6190

Type:

Article

Abstract:

Methods of transmission and scanning electron microscopy, X-ray diffraction analysis, microhardness, and wavelength dispersive X-ray microanalysis have been used to investigate the changes (in the process of vacuum treatment for 10-1200 min at temperatures of 350-550 degrees C) in the structure, microhardness, and chemical composition of the surface layers of steel U8 (0.83 wt \% C) in the initial quenched state and after friction treatment in the argon medium under the conditions of sliding friction using a like spherical indenter-flat sample pair. It has been shown that the layer nanostuctured by friction treatment possesses an enhanced resistance to thermal softening compared with the undeformed quenched steel, not only upon relatively short heating (1-2 h), but also prolonged heating (to 20 h) at temperatures of 350, 450, and 550 degrees C. This is due to the retention of predominantly nanocrystalline structure in the deformed layer upon the prolonged heating to a temperature of 350 degrees C by retarding the processes of the formation of carbide particles and recovery in the alpha phase and by decelerating the development of recrystallization, including the absence of anomalous growth of separate recrystallized grains upon prolonged high-temperature holdings. After vacuum annealing for 10-1200 min at a temperature of 350 degrees C, an increase was revealed in the carbon concentration by 0.2-0.4 wt \% in a layer up to 1 mu m thick on the surface of quenched eutectoid steel deformed by friction action.

Author keywords:

high-carbon steel; friction treatment; nanocrystalline structures; microhardness; thermal stability; vacuum; chemical composition SEVERE PLASTIC-DEFORMATION; TRIBOLOGICAL PROPERTIES; ANNEALING BEHAVIOR; MECHANICAL-PROPERTIES; SURFACE-LAYER; GRAIN-GROWTH; IRON; DIFFUSION; RECRYSTALLIZATION; MICROSTRUCTURE

DOI:

10.1134/S0031918X14030065

Web of Science ID:

ISI:000335681500011

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	SEVERE PLASTIC-DEFORMATION; TRIBOLOGICAL PROPERTIES; ANNEALING BEHAVIOR; MECHANICAL-PROPERTIES; SURFACE-LAYER; GRAIN-GROWTH; IRON; DIFFUSION; RECRYSTALLIZATION; MICROSTRUCTURE
Research-Areas	Metallurgy \& Metallurgical Engineering
Web-of-Science-Categories	Metallurgy \& Metallurgical Engineering
Author-Email	makarov@imach.uran.ru
ResearcherID-Numbers	Makarov, Aleksey/D-5663-2016 Malygina, Irina/D-6043-2016 Savrai, Roman/D-5571-2016 Korshunov, Lev/J-4288-2013 Chernenko, Natalja/J-3525-2013
ORCID-Numbers	Makarov, Aleksey/0000-0002-2228-0643 Savrai, Roman/0000-0001-9873-3621 Korshunov, Lev/0000-0002-1829-5658 Chernenko, Natalja/0000-0002-5666-3247
Funding-Acknowledgement	Russian Foundation for Basic Research {[}11-08-01025-a]; Program for Basic Research of the Ural Branch, Russian Academy of Sciences {[}12-T-1-1010]
Funding-Text	This work was supported in part by the Russian Foundation for Basic Research (project no. 11-08-01025-a) and by the Program for Basic Research of the Ural Branch, Russian Academy of Sciences (project no. 12-T-1-1010) according to the program of the Division of Power Engineering, Engineering Science, Mechanics, and Controlling Processes (OEMMPU), Russian Academy of Sciences.
Number-of-Cited-References	50
Usage-Count-Since-2013	6
Journal-ISO	Phys. Metals Metallogr.
Doc-Delivery-Number	AG8PU