Near-threshold fatigue crack growth behavior of Mil S-24645 HSLA steel and its weldments

Journal Article · Sun Aug 01 00:00:00 EDT 1993 · Journal of Offshore Mechanics and Arctic Engineering

DOI:https://doi.org/10.1115/1.2920107· OSTI ID:139753

Todd, J A; Chen, L; Yankov, E Y ^[1]

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1. Illinois Inst. of Tech., Chicago, IL (United States). Dept. of Metallurgical and Materials Engineering

The near-threshold corrosion fatigue crack propagation behavior of Mil S-24645 HSLA steel, its weld metal and heat-affected zone have been studied in simulated marine environments. Tests were conducted in air and ASTM seawater, at both the free corrosion potential and {minus}1.0V (SCE), using a frequency of 0.2 Hz and a stress ratio, R = 0.1. The results were compared with previous data for Mil S-24645 and ASTM A710 steel tested at frequencies of 10 and 2 Hz. The influence of frequency, microstructure, and cathodic protection on crack closure contributions in the near-threshold regime will be discussed.

• Sponsoring Organization: USDOE
• OSTI ID: 139753
• Journal Information: Journal of Offshore Mechanics and Arctic Engineering, Journal Name: Journal of Offshore Mechanics and Arctic Engineering Journal Issue: 3 Vol. 115; ISSN 0892-7219; ISSN JMOEEX
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
42 ENGINEERING
CATHODIC PROTECTION
CORROSION RESISTANT ALLOYS
CORROSIVE EFFECTS
CRACK PROPAGATION
FATIGUE
FRACTURE MECHANICS
MATERIALS
MATERIALS TESTING
OFFSHORE PLATFORMS
SEAWATER
STAINLESS STEELS
STRESS ANALYSIS
WELDED JOINTS