Publication result detail

Microfractography of Fish-Eye Fractures in Nitrided Steel

SLÁMEČKA, K.; POKLUDA, J.; BONAVENTUROVÁ, K.; ČELKO, L.

Original Title

Microfractography of Fish-Eye Fractures in Nitrided Steel

English Title

Microfractography of Fish-Eye Fractures in Nitrided Steel

Type

Peer-reviewed article not indexed in WoS or Scopus

Original Abstract

The paper presents results of the micro-fractographical study of fish-eye cracks that were formed in plasma-nitrided specimens under symmetrical bending, symmetrical torsion and biaxial in-phase bending-torsion loading regimes. Analysis of the local striation field found near the inclusion in the center of the fish-eye crack together with the local roughness measurements support the hypothesis that the cracks propagate predominantly by mode I micromechanisms. Moreover, the extrapolation of the local crack growth rate curve to the overall fish-eye crack region suggests that similarly to the gigacycle fatigue, the most of the fatigue life is spent on the initiation of the interior microcrack.

English abstract

The paper presents results of the micro-fractographical study of fish-eye cracks that were formed in plasma-nitrided specimens under symmetrical bending, symmetrical torsion and biaxial in-phase bending-torsion loading regimes. Analysis of the local striation field found near the inclusion in the center of the fish-eye crack together with the local roughness measurements support the hypothesis that the cracks propagate predominantly by mode I micromechanisms. Moreover, the extrapolation of the local crack growth rate curve to the overall fish-eye crack region suggests that similarly to the gigacycle fatigue, the most of the fatigue life is spent on the initiation of the interior microcrack.

Keywords

Fractography, fish-eye cracks, bending-torsion fatigue, striations, nitrided steel

Key words in English

Fractography, fish-eye cracks, bending-torsion fatigue, striations, nitrided steel

Authors

SLÁMEČKA, K.; POKLUDA, J.; BONAVENTUROVÁ, K.; ČELKO, L.

RIV year

2012

Released

15.07.2011

Location

Brno

ISBN

0009-2770

Periodical

CHEMICKE LISTY

Volume

105

Number

S

State

Czech Republic

Pages from

721

Pages to

724

Pages count

4

BibTex

@article{BUT73471,
  author="Karel {Slámečka} and Jaroslav {Pokluda} and Kateřina {Bonaventurová} and Ladislav {Čelko}",
  title="Microfractography of Fish-Eye Fractures in Nitrided Steel",
  journal="CHEMICKE LISTY",
  year="2011",
  volume="105",
  number="S",
  pages="721--724",
  issn="0009-2770"
}