Environmental effects on the fatigue crack growth rate of high strength low alloy structural steel (HSLA 80)

Book · Sat Dec 31 04:00:00 EST 1994

OSTI ID:70132

Bavarian, B; Zakaria, M; Rodriguez, C; Magee, A ^[1]

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1. California State Univ., Northridge, CA (United States). School of Engineering and Computer Science

Fatigue crack growth rate experiments were performed on compact tension specimens of high strength low alloy structural steel (HSLA80, ASTM A710) in air, 3.5% NaCl, and artificial seawater solutions to investigate environmental effects on its crack growth rate, and threshold stress intensity factor range. Stress ratio for the tests were 0.1, and 0.8 while a sinusoidal loading was applied at a test frequency of 1, and 10 Hz. Comparison of the da/dN-Delta K curves shows that the fatigue crack growth rates of this steel fall in the same scatter band and the shift in the fatigue crack growth rate was not significant in all exposed environments, except artificial seawater at stress ratio of 0.1. However, the threshold stress intensity factor range was affected by t -he exposed environments, and it showed a drop from 12 MPa {times}m{sup 0.5} (for air) to 8 MPa {times}m{sup 0.5} (for artificial seawater and 3.5% NaCl solutions).

• OSTI ID: 70132
• Report Number(s): CONF-940222--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
CORROSION FATIGUE
CORROSIVE EFFECTS
CRACK PROPAGATION
DRILLING EQUIPMENT
ELECTROCHEMICAL CORROSION
EXPERIMENTAL DATA
LOW ALLOY STEELS
MINING EQUIPMENT
OFFSHORE PLATFORMS
PIPELINES
SEAWATER
SHIPS
SODIUM CHLORIDES
STRESS INTENSITY FACTORS