The role of nanoscale strain-induced defects in the sharp increase of low-temperature toughness in low-carbon and low-alloy steels; Materials Science and Engineering: A; Vol. 768

The role of nanoscale strain-induced defects in the sharp increase of low-temperature toughness in low-carbon and low-alloy steels; Materials Science and Engineering: A; Vol. 768

Bibliografiske detaljer
Parent link:	Materials Science and Engineering: A Vol. 768.— 2019.— [138491, 9 p.]
Andre forfattere:	Panin V. E. Viktor Evgenyevich, Derevyagina L. S., Panin S. V. Sergey Viktorovich, Shugurov A. R. Artur Rubinovich, Gordienko A. I. Antonina Ildarovna
Summary:	Title screen In the paper it is studied how the modes of thermal treatment of low-carbon steels alloyed with manganese (09G2S) and with manganese, vanadium, and niobium (10G2FBYu) affect their hierarchical structure and toughness in the low-temperature region from +20 down to ?70 °C. A fine-grained structure, quasi-homogeneous lattice curvature, and nanoscale mesoscopic structural states arising due to radial-shear rolling at 850 °C are shown to be responsible for the formation of a nonequilibrium nanoscale bainitic structure, being a highly effective damping factor in a deformed material. The pearlitic steel structure is equilibrium and is formed within a translation-invariant crystal lattice, while the bainitic structure results from nanoscale mesoscopic structural states in interstices of lattice curvature zones. A spatial change in the lattice curvature is accompanied by a synchronous transformation of the nanoscale mesoscopic structural states and structural geometry of the bainitic phase. That is why the toughness of the steel with bainitic structure is very high down to the temperature ?70 °C. Scratch testing is used to estimate the possibility of elastic recovery of bainitic phases in deformed steels.
Sprog:	engelsk
Udgivet:	2019
Fag:	электронный ресурс труды учёных ТПУ low-carbon steels lattice curvature nanoscale mesoscopic structural states bainitic structure low-temperature toughness низкоуглеродистые стали наноразмерные состояния вязкость
Online adgang:	https://doi.org/10.1016/j.msea.2019.138491
Format:	Electronisk Book Chapter
KOHA link:	https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=664838

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