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Lookup NU author(s): Paul Hopkins
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Oil and gas pipelines may be required to withstand high plastic strains as part of their design, or high strains may be introduced inadvertently through external interference or ground movement. Experimental studies have indicated that pre-strain (permanent plastic deformation) has a detrimental effect on the fracture toughness of steel. To investigate the effect of pre-strain on the fracture toughness of line pipe steel, a programme of tests has been undertaken on specimens of an API 5L X80 line pipe steel. The results of tensile tests, notched tensile tests, fracture toughness tests (J-integral and CTOD) and Charpy V-notch impact tests of virgin (not pre-strained) material and (tensile) pre-strained material are reported here.
Author(s): Hopkins P; Cosham A
Publication type: Conference Proceedings (inc. Abstract)
Publication status: Published
Conference Name: 10th International Conference on Pressure Vessel Technology (ICPVT)
Year of Conference: 2003
Publisher: ICPVT
