Fatigue striation in a wide range of crack propagation rates up to 70 μm/cycle in a ductile structural steel

C. Masuda, A. Ohta, S. Nishijima, E. Sasaki

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The relationship between striation spacing and fatigue crack propagation rate up to 70 μm/cycle was investigated for a ductile structural steel, qualified as JIS SM58Q. A modified compact-type specimen 400 mm wide and a centre-cracked specimen 200 mm wide were tested at a stress ratio, R, of 0 and 0.8. The fracture surface of the specimen was examined in detail under a scanning electron microscope. The crack propagation rate was expressed by a power function of the range of stress intensity factor from 0.1 to 70 μm/cycle for R=0 and to 0.5 μm/cycle for R=0.8. The striation spacing coincided with the fatigue crack propagation rate over the range 0.1 to 70 μm/cycle. The profile of striation was found to be a "ridge and valley" type, and the ridges on one fracture surface coincided with those on the matching surface. It is suggested that the striation is formed by a plastic blunting mechanism.

Original languageEnglish
Pages (from-to)1663-1670
Number of pages8
JournalJournal of Materials Science
Volume15
Issue number7
DOIs
Publication statusPublished - 1980 Jul
Externally publishedYes

Fingerprint

striation
Steel
crack propagation
Crack propagation
steels
Fatigue of materials
Fatigue crack propagation
cycles
ridges
spacing
stress ratio
Stress intensity factors
stress intensity factors
Electron microscopes
Plastics
Scanning
valleys
plastics
electron microscopes
scanning

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials
  • Materials Science(all)

Cite this

Fatigue striation in a wide range of crack propagation rates up to 70 μm/cycle in a ductile structural steel. / Masuda, C.; Ohta, A.; Nishijima, S.; Sasaki, E.

In: Journal of Materials Science, Vol. 15, No. 7, 07.1980, p. 1663-1670.

Research output: Contribution to journalArticle

Masuda, C. ; Ohta, A. ; Nishijima, S. ; Sasaki, E. / Fatigue striation in a wide range of crack propagation rates up to 70 μm/cycle in a ductile structural steel. In: Journal of Materials Science. 1980 ; Vol. 15, No. 7. pp. 1663-1670.
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