Publication detail

Micromechanical aspects of the effect of temperature and local plastic strain magnitude on the fracture toughness of ferrite steels

KOTRECHKO, S. KOZÁK, V. ZATSARNA, O. ZIMINA, G. STETSENKO, N. DLOUHÝ, I.

Original Title

Micromechanical aspects of the effect of temperature and local plastic strain magnitude on the fracture toughness of ferrite steels

Type

conference paper

Language

English

Original Abstract

The paper shows that the influence of plastic strain and temperature on the rate of crack nuclei (CN) formation is a crucial factor controlling the shape of the temperature dependence of fracture toughness and its scatter limits. Within the framework of the microscopic model described, it is explained that the dependence of the incompatibility of microplastic deformation at grain boundaries or interfaces on the value of plastic strain and temperature is the reason for the effect of these factors on the rate of CN formation. The dependencies of the CN bulk density on temperature and plastic strain are given. In the latter case, a non-monotonic change in CN density is observed. The maximum intensity of CN formation is observed when the critical value of plastic strain is reached. For ferritic structural steels, this strain is about 2%. Using reactor pressure vessel steel and cast manganese steel as examples, it is shown that not taking these effects into account in the local fracture approach leads to considerable errors in the prediction of the temperature dependence of the fracture toughness and its scatter limits.

Keywords

fracture toughness; ductile-to-brittle transition; local approach to fracture; crack nuclei; micromechanism

Authors

KOTRECHKO, S.; KOZÁK, V.; ZATSARNA, O.; ZIMINA, G.; STETSENKO, N.; DLOUHÝ, I.

Released

18. 1. 2023

Publisher

Elsevier

Location

Amsterdam

ISBN

2452-3216

Periodical

Procedia Structural Integrity

Year of study

43

Number

1

State

Republic of Italy

Pages from

228

Pages to

233

Pages count

6

URL

https://www.sciencedirect.com/science/article/pii/S2452321622008265

Full text in the Digital Library

http://hdl.handle.net/11012/213733

BibTex

@inproceedings{BUT181511,
  author="Sergiy {Kotrechko} and Vladislav {Kozák} and Oleksandra {Zatsarna} and Galina {Zimina} and Nataliya {Stetsenko} and Ivo {Dlouhý}",
  title="Micromechanical aspects of the effect of temperature and local plastic strain magnitude on the fracture toughness of ferrite steels",
  booktitle="MSMF 10 Proceedings",
  year="2023",
  journal="Procedia Structural Integrity",
  volume="43",
  number="1",
  pages="228--233",
  publisher="Elsevier",
  address="Amsterdam",
  doi="10.1016/j.prostr.2022.12.263",
  issn="2452-3216",
  url="https://www.sciencedirect.com/science/article/pii/S2452321622008265"
}