Crack closure effects on fatigue crack growth thresholds and remaining life in an HSLA steel

Journal Article · Fri Jan 31 23:00:00 EST 1997 · Journal of Pressure Vessel Technology

DOI:https://doi.org/10.1115/1.2842264· OSTI ID:442841

Todd, J A; Mostovoy, S ^[1]; Chen, L ^[2]; Yankov, E Y ^[3]

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1. Illinois Inst. of Tech., Chicago, IL (United States). Dept. of Mechanical, Materials and Aerospace Engineering
2. Texas Instruments, Attleboro, MA (United States)
3. A. Finkl and Sons, Chicago, IL (United States)

The effects of crack closure on the near-threshold corrosion fatigue crack growth behavior of Mil S-24645 HSLA steel and its weld metal have been investigated in air, ASTM seawater at the free corrosion potential, and ASTM seawater at {minus}0.8V and {minus}1.0V (SCE) using frequencies of 10, 2, and 0.2 Hz, and a stress ratio, R = 0.1. Remaining life, in the presence and absence of crack closure, has been estimated as a function of applied stress range for a structure containing a 3-mm-deep surface semi-elliptical flaw.

• Sponsoring Organization: Department of the Navy, Washington, DC (United States); National Oceanic and Atmospheric Administration, Washington, DC (United States)
• OSTI ID: 442841
• Journal Information: Journal of Pressure Vessel Technology, Journal Name: Journal of Pressure Vessel Technology Journal Issue: 1 Vol. 119; ISSN 0094-9930; ISSN JPVTAS
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AIR
CORROSION FATIGUE
CORROSIVE EFFECTS
CRACK PROPAGATION
EXPERIMENTAL DATA
LOW ALLOY STEELS
SEAWATER
SERVICE LIFE