FACTORS INFLUENCING THRESHOLD STRESS INTENSITY VALUES AND CRACK PROPAGATION RATES DURING STRESS CORROSION CRACKING TESTS OF HIGH STRENGTH STEELS

A number of factors have been identified which influence both observed threshold stress intensity values and crack propagation rates for the stress corrosion of high strength steels in aqueous environments. More specifically K sub ISCC values for a number of steels have been shown to be related to the formation of a continuous stretch zone at the fatigue crack tip. Both K sub ISCC and K sub IC values are influenced by the yield strength and inclusion density of the steel. The relative values of K sub ISCC determined by arrest and initiation methods and the stress corrosion crack growth rates are influenced by the effectiveness of stress corrosion cracks as stress concentrators, since intergranular cracks become progressively blunter as they propagate, while the reverse can be true of transgranular cracks. Observed stress corrosion crack propagation rates are also influenced by the failure to attain equilibrium in specimens of conventional length and by the presence of crack curvature and crack branching where these occur.

• Corporate Authors:

  British Iron and Steel Research Association

  24 Buckingham Gate
  London SW1,   England 
• Authors:
  • Priest, A H
  • McIntyre, P
• Publication Date: 1971-11

Media Info

• Serial:
  • BISRA Open Report
  • Volume: 57
  • Publisher: British Iron and Steel Research Association

Subject/Index Terms

• TRT Terms: Cracking; High strength steel; Stress corrosion; Stress cracking; Stresses
• Uncontrolled Terms: Crack propagation
• Old TRIS Terms: Corrosion cracking
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00028773
• Record Type: Publication
• Source Agency: British Iron and Steel Research Association
• Report/Paper Numbers: BISRA/MG/59/71
• Files: TRIS
• Created Date: Mar 28 1973 12:00AM