This paper discusses the problem of determining the cahracteristic values in ductile fracture mechanics on the basis of the fracture toughness. K_Ic, for a double-sided spiral submerged arc weld pipeline material. Special interest was directed twoards relatively thin ready-to-se pipe of the ht rolled steel API 5L-X52. For this purpose Charpy V-notch impact tests on subsized specimens were perofrmed at temperatures ranging from -80degC to 0degC. The specimens were taken from the weld zone and the parent material remote from the welds. The V-notches were so oriented as to reproduce the fracture path which would result through the pipe-thickness.
展开▼
