Crack Tip Opening Displacement of X100 SAWL Pipe
The fracture toughness of different zones of X100 SAWL pipe was studied by three-point bend test method under different temperature. At the same temperature, the crack propagation resistance and tear modulus of X100 SAWL pipe distributed as: base metal>HAZ>weld bead, and the distribution of the CTOD value of X100 SAWL pipe is :base metal >weld bead >HAZ. Further investigation was conducted to analyze the decrease of fracture toughness (especially low temperature fracture toughness) and the occurrence of local unstable phenomenon in HAZ specimens.
Jianzhong Wang and Jingang Qi
Q. R. Xiong et al., "Crack Tip Opening Displacement of X100 SAWL Pipe", Advanced Materials Research, Vols. 299-300, pp. 292-297, 2011