Crack-tip-opening displacement (CTOD) and fatigue-crack growth tests were conducted for several line pipe steels with uniaxial tensile or compressive prestrain, Critical CTOD decreased with increasing The reduction of critical CTOD due to prestrain was dependent on the ductile-brittle transition temperature of the steels without prestrain. A few percent of induced the ductile-brittle transition for the steels with a higher transition temperature. The compressive had larger effects on both reduction of critical CTOD and strain induced ductile-brittle transition than the tensile Only the high compressive accelerated both fatigue crack initiation and growth, and no obvious effect of the tensile on the fatigue properties was observed.
Effects of Prestrain on Fracture Toughness and Fatigue-Crack Growth of Line Pipe Steels
Contributed by the Pressure Vessels and Piping Division and presented at the International Pipeline Conference, Calgary, Alberta, Canada, October 1–5, 2000, of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS. Manuscript received by the PVP Division, July 21, 2000; revised manuscript received April 20, 2001. Associate Editor: C. E. Jaske.
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Hagiwara, N., Masuda, T., and Oguchi, N. (April 20, 2001). "Effects of Prestrain on Fracture Toughness and Fatigue-Crack Growth of Line Pipe Steels ." ASME. J. Pressure Vessel Technol. August 2001; 123(3): 355–361. https://doi.org/10.1115/1.1379531
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