Publication result detail

Dynamic Fracture Characteristics of High-Strength Steel

KIANICOVÁ, M.; DLOUHÝ, I.; ŠANDERA, P.; HORNÍKOVÁ, J.; POKLUDA, J.

Original Title

Dynamic Fracture Characteristics of High-Strength Steel

English Title

Dynamic Fracture Characteristics of High-Strength Steel

Type

Scopus Article

Original Abstract

The absorbed impact energy KV and the dynamic fracture toughness KId of the low-alloyed steel OCHN3MFA were measured in the respective temperature ranges 〈–40, 90〉 and 〈–60, –20〉 °C. The values of impact energy in the range of 〈14.1, 21.3〉 J were obtained using Charpy V-notch samples after subtracting parasitic energies (friction in bearings, etc.). All these values corresponded to an extended transition region since the temperature –40 °C was still higher than the lower shelf impact-energy (shear lips present) and the temperature 90 °C was lower than the upper shelf (only 20 % of ductile morphology). Dynamic fracture toughness was determined using Charpy V-notch samples with fatigue pre-cracks. The relatedKId-values were obtained in the range〈55.8, 77.5〉 MPa.m1/2. They were found to be valid linear-elastic fracture toughness and were somewhat higher than the previously reported static KIc-values. The study revealed that OCHN3MFA steel has sufficient resistance to dynamic fracture, particularly at low temperatures

English abstract

The absorbed impact energy KV and the dynamic fracture toughness KId of the low-alloyed steel OCHN3MFA were measured in the respective temperature ranges 〈–40, 90〉 and 〈–60, –20〉 °C. The values of impact energy in the range of 〈14.1, 21.3〉 J were obtained using Charpy V-notch samples after subtracting parasitic energies (friction in bearings, etc.). All these values corresponded to an extended transition region since the temperature –40 °C was still higher than the lower shelf impact-energy (shear lips present) and the temperature 90 °C was lower than the upper shelf (only 20 % of ductile morphology). Dynamic fracture toughness was determined using Charpy V-notch samples with fatigue pre-cracks. The relatedKId-values were obtained in the range〈55.8, 77.5〉 MPa.m1/2. They were found to be valid linear-elastic fracture toughness and were somewhat higher than the previously reported static KIc-values. The study revealed that OCHN3MFA steel has sufficient resistance to dynamic fracture, particularly at low temperatures

Keywords

absorbed impact energy; dynamic fracture toughness; high-strength steel; transition range; fracture surface morphology

Key words in English

absorbed impact energy; dynamic fracture toughness; high-strength steel; transition range; fracture surface morphology

Authors

KIANICOVÁ, M.; DLOUHÝ, I.; ŠANDERA, P.; HORNÍKOVÁ, J.; POKLUDA, J.

RIV year

2024

Released

24.03.2023

Publisher

Trans Tech Publications Ltd

ISBN

1012-0386

Periodical

Defect and Diffusion Forum

Volume

422

Number

1

State

Swiss Confederation

Pages from

45

Pages to

49

Pages count

5

URL

https://www.scientific.net/DDF.422.45.pdf

BibTex

@article{BUT183139,
  author="Marta {Kianicová} and Ivo {Dlouhý} and Pavel {Šandera} and Jana {Horníková} and Jaroslav {Pokluda}",
  title="Dynamic Fracture Characteristics of High-Strength Steel",
  journal="Defect and Diffusion Forum",
  year="2023",
  volume="422",
  number="1",
  pages="45--49",
  doi="10.4028/p-psqq46",
  issn="1012-0386",
  url="https://www.scientific.net/DDF.422.45.pdf"
}