Detail publikace

Incorporation of temperature and plastic strain effects into local approach to fracture

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

Originální název

Incorporation of temperature and plastic strain effects into local approach to fracture

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

An unjustified simplification of the local quantitative criterion regarding cleavage nucleation is a key problem in the utilisation of the Local Approach to Fracture (LA), particularly to predict the fracture toughness within the ductile-to-brittle transition (DBT) region. The theoretical concept of the effect of both temperature and the plastic strain value on the crack nuclei (CN) generation rate in iron and ferritic steels is presented. It is shown how the plastic strain and temperature affect CN formation rate and, as a consequence, govern the shape of the temperature dependence of fracture toughness K-Jc and its scatter limits. Within the framework of the microscopic model proposed, dependences of the CN bulk density on the plastic deformation value and temperature are predicted. Convenient approximation dependences for incorporating this effect into the LA are suggested. The experimental data of reactor pressure vessel steel and cast manganese steel demonstrate that the use of these dependences enables one to predict, with sufficient accuracy, the effect of temperature on the value of fracture toughness and its scatter limits over the DBT region. It is shown that accounting for both the temperature and strain dependence of CN bulk density gives rise to the invariance of parameters of the Weibull distribution to temperature.

Klíčová slova

fracture toughness; ductile-to-brittle transition; local approach to fracture; ferritic steel

Autoři

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

Vydáno

15. 10. 2021

Nakladatel

MDPI

Místo

Basel

ISSN

1996-1944

Periodikum

Materials

Ročník

14

Číslo

20

Stát

Švýcarská konfederace

Strany od

1

Strany do

11

Strany počet

11

URL

https://www.mdpi.com/1996-1944/14/20/6224

Plný text v Digitální knihovně

http://hdl.handle.net/11012/204028

BibTex

@article{BUT176298,
  author="Sergiy {Kotrechko} and Vladislav {Kozák} and Oleksandra {Zatsarna} and Galina {Zimina} and Nataliya {Stetsenko} and Ivo {Dlouhý}",
  title="Incorporation of temperature and plastic strain effects into local approach to fracture",
  journal="Materials",
  year="2021",
  volume="14",
  number="20",
  pages="1--11",
  doi="10.3390/ma14206224",
  issn="1996-1944",
  url="https://www.mdpi.com/1996-1944/14/20/6224"
}