To investigate the mechanical properties of pipeline subjected to plastic deformation, tensile tests and crack-tip-opening displacement (CTOD) tests were conducted on X60, X65 and X80 line pipe steels with uniaxial tensile or compressive prestrain, εpr. The tensile tests revealed that the Bauschinger effect and work hardening were dependent on the yield-to-tensile ratio (Y/T) of the steels; the change in yield stress due to prestrain linearly depended on the Y/T of the base metal. A critical CTOD for crack initiation decreased with increasing |εpr|.Compressive prestrain had a larger effect on the reduction of the critical CTOD than tensile prestrain. The reduction in the critical CTOD due to tensile prestrain was predictable with a simplified theoretical model employing a critical fracture strain of the base metal.
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2002 4th International Pipeline Conference
September 29–October 3, 2002
Calgary, Alberta, Canada
Conference Sponsors:
- Pipeline Division
ISBN:
0-7918-3620-7
PROCEEDINGS PAPER
Effect of Prestrain on Tensile and Fracture Toughness Properties of Line Pipes
Naoki Fukuda,
Naoki Fukuda
Tokyo Gas Company, Ltd., Yokohama, Japan
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Naoto Hagiwara,
Naoto Hagiwara
Tokyo Gas Company, Ltd., Yokohama, Japan
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Tomoki Masuda
Tomoki Masuda
Tokyo Gas Company, Ltd., Yokohama, Japan
Search for other works by this author on:
Naoki Fukuda
Tokyo Gas Company, Ltd., Yokohama, Japan
Naoto Hagiwara
Tokyo Gas Company, Ltd., Yokohama, Japan
Tomoki Masuda
Tokyo Gas Company, Ltd., Yokohama, Japan
Paper No:
IPC2002-27127, pp. 1635-1642; 8 pages
Published Online:
February 24, 2009
Citation
Fukuda, N, Hagiwara, N, & Masuda, T. "Effect of Prestrain on Tensile and Fracture Toughness Properties of Line Pipes." Proceedings of the 2002 4th International Pipeline Conference. 4th International Pipeline Conference, Parts A and B. Calgary, Alberta, Canada. September 29–October 3, 2002. pp. 1635-1642. ASME. https://doi.org/10.1115/IPC2002-27127
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