Structure and Mechanical Properties of a High-Carbon Steel Subjected to Severe Deformation / Gorkunov E. S.,Zadvorkin S. M.,Goruleva L. S.,Makarov A. V.,Pecherkina N. L. // PHYSICS OF METALS AND METALLOGRAPHY. - 2017. - V. 118, l. 10. - P. 1006-1014.

ISSN/EISSN:

0031-918X / 1555-6190

Type:

Article

Abstract:

The structure and mechanical properties of a high-carbon eutectic steel subjected to the cold plastic deformation by hydrostatic extrusion in a wide range of true strain have been studied. Using scanning and transmission electron microscopy, it has been shown that the formation of cellular, fragmented, and submicrocrystalline structures occurs in the ferritic constituent of the pearlite structure of the steel upon extrusion. This is a consequence of the occurrence of dynamic recovery and continuous dynamic and post-dynamic recrystallization, which cause a decrease in the density of free dislocations at the true strain of more than 1.62. The partial dissolution of the carbide phase is also observed. It has been found that, at a true strain of up to 0.81, the strength properties of the investigated steel are determined mainly by subgrain, dislocation, and precipitation mechanisms of the strengthening; in the deformation range of 0.81-1.62, the role of the grainboundary strengthening increases. At strains above 1.62, grain-boundary strengthening is a prevailing mechanism in the formation of the level of strength properties of the extruded U8A steel. The ultimate tensile strength and yield stress over the entire strain range only uniquely correlate with the density of highangle boundaries; the dependences of the strength characteristics on other structural parameters are not monotonic.

Author keywords:

eutectic steel; plastic deformation; hydrostatic extrusion; structure; high-angle and low-angle boundaries; density of dislocations; mechanical characteristics SEVERE PLASTIC-DEFORMATION; STAINLESS-STEEL; PEARLITIC STEEL; CHEMICAL-COMPOSITION; FRICTION TREATMENT; PHASE-COMPOSITION; TEMPERATURE; EVOLUTION; RECRYSTALLIZATION; TITANIUM

DOI:

10.1134/S0031918X17100076

Web of Science ID:

ISI:000413659000010

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	OCT
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; STAINLESS-STEEL; PEARLITIC STEEL; CHEMICAL-COMPOSITION; FRICTION TREATMENT; PHASE-COMPOSITION; TEMPERATURE; EVOLUTION; RECRYSTALLIZATION; TITANIUM
Research-Areas	Metallurgy \& Metallurgical Engineering
Web-of-Science-Categories	Metallurgy \& Metallurgical Engineering
Author-Email	sherlarisa@yandex.ru
Funding-Acknowledgement	Russian Foundation for Basic Research {[}16-38-00586]; {[}01201354598]; {[}01201463331]
Funding-Text	We are grateful to D.I. Vichuzhanin, A.B. Bukhvalov, S.N. Sergeev, and A.V. Aleksandrov for their help carrying out research. The work was performed using equipment of the Plastometry Center of Collaborative Access, Institute of Engineering Science, Ural Branch, Russian Academy of Sciences. An electron-microscopic study was performed by the method of thin foils at the Electron Microscopy, Center of Collaborative Access, Ural Branch, Russian Academy of Sciences at the Department of electron microscopy of the Testing Center of Nanotechnologies and Promising Materials of the Institute of Metal Physics, Ural Branch, Russian Academy of Sciences. The work was supported in part by the Russian Foundation for Basic Research (project no. 16-38-00586) and by the state task (themes no. 01201354598 and no. 01201463331).
Number-of-Cited-References	48
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	1
Journal-ISO	Phys. Metals Metallogr.
Doc-Delivery-Number	FK7BN