The role of nanoscale strain-induced defects in the sharp increase of low-temperature toughness in low-carbon and low-alloy steels

V. E. Panin, L. S. Derevyagina, S. V. Panin, A. R. Shugurov, A. I. Gordienko

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish
Article number138491
JournalMaterials Science and Engineering A
Volume768
DOIs
Publication statusPublished - 19 Dec 2019

Fingerprint

high strength steels
Steel
toughness
Manganese
High strength steel
Toughness
Carbon
curvature
Niobium
Vanadium
Defects
manganese
carbon
defects
Low carbon steel
Steel structures
Crystal lattices
steels
steel structures
interstices

Keywords

  • Bainitic structure
  • Lattice curvature
  • Low-carbon steels
  • Low-temperature toughness
  • Nanoscale mesoscopic structural states

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

The role of nanoscale strain-induced defects in the sharp increase of low-temperature toughness in low-carbon and low-alloy steels. / Panin, V. E.; Derevyagina, L. S.; Panin, S. V.; Shugurov, A. R.; Gordienko, A. I.

In: Materials Science and Engineering A, Vol. 768, 138491, 19.12.2019.

Research output: Contribution to journalArticle

@article{658c4ea296324800a11af5916c3d11b1,
title = "The role of nanoscale strain-induced defects in the sharp increase of low-temperature toughness in low-carbon and low-alloy steels",
abstract = "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.",
keywords = "Bainitic structure, Lattice curvature, Low-carbon steels, Low-temperature toughness, Nanoscale mesoscopic structural states",
author = "Panin, {V. E.} and Derevyagina, {L. S.} and Panin, {S. V.} and Shugurov, {A. R.} and Gordienko, {A. I.}",
year = "2019",
month = "12",
day = "19",
doi = "10.1016/j.msea.2019.138491",
language = "English",
volume = "768",
journal = "Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing",
issn = "0921-5093",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - The role of nanoscale strain-induced defects in the sharp increase of low-temperature toughness in low-carbon and low-alloy steels

AU - Panin, V. E.

AU - Derevyagina, L. S.

AU - Panin, S. V.

AU - Shugurov, A. R.

AU - Gordienko, A. I.

PY - 2019/12/19

Y1 - 2019/12/19

N2 - 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.

AB - 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.

KW - Bainitic structure

KW - Lattice curvature

KW - Low-carbon steels

KW - Low-temperature toughness

KW - Nanoscale mesoscopic structural states

UR - http://www.scopus.com/inward/record.url?scp=85072772501&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85072772501&partnerID=8YFLogxK

U2 - 10.1016/j.msea.2019.138491

DO - 10.1016/j.msea.2019.138491

M3 - Article

AN - SCOPUS:85072772501

VL - 768

JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

SN - 0921-5093

M1 - 138491

ER -