Publication detail

Dynamic Fracture Characteristics of High-Strength Steel

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

English title

Dynamic Fracture Characteristics of High-Strength Steel

Type

journal article in Scopus

Language

en

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 in English

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

Released

24.03.2023

Publisher

Trans Tech Publications Ltd

ISSN

1012-0386

Volume

422

Number

1

Pages from–to

45–49

Pages count

5

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",
  year="2023",
  volume="422",
  number="1",
  month="March",
  pages="45--49",
  publisher="Trans Tech Publications Ltd",
  issn="1012-0386"
}