Experimental Results for Fitness-for-Service Assessment of HY130 Weldments

摘要

Applied J-integral values for through and surface cracks in HY130 weldments and for surface cracks in HY130 base metal have been measured using a previously developed technique. The applied J-integral is taken as a measure of the crack driving force. The results confirmed previous conclusions, namely, the strong effect of deformation pattern on applied J-integral values, the utility of the J-integral estimation curve for fitness-for-service assessment in cases of gross section yielding (crack size less than 1 percent of load-bearing cross-section), and the need to consider ligament yielding behind surface cracks.