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On the Formulation of Local Brittle Fracture Criterion for Predicting Crack Resistance of High-Strength Steel

Authors
  • Ilyin, A. V.1
  • Lavrentiev, A. A.1
  • Mizetsky, A. V.1
  • 1 National Research Center Kurchatov Institute—CRISM Prometey, St. Petersburg, 191015, Russia , St. Petersburg (Russia)
Type
Published Article
Journal
Inorganic Materials: Applied Research
Publisher
Pleiades Publishing
Publication Date
Nov 01, 2021
Volume
12
Issue
6
Pages
1628–1641
Identifiers
DOI: 10.1134/S2075113321060022
Source
Springer Nature
Keywords
Disciplines
  • Structural and Technological Strength and Performance of Materials
License
Yellow

Abstract

The use of local brittle fracture criteria for predicting the crack resistance of low-alloy steels is a generally accepted approach. The feasibility of this approach is analyzed as applied to the experimental smelts of high-strength low-alloy steel plates with yield strength amounting to about 1000 MPa, whose structural was studied earlier. Three types of cylindrical samples with an annular notch differing in the stress-strain state in the net cross section are tested. It is found that the use of the simplest formulation of such a criterion in the form of an energy condition for the propagation of microcracks through structural barriers (large-angle grain boundaries) leads to acceptable results for notched samples made of metal with different grain size and makes it possible to connect these results with the crack resistance of the studied materials.

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