This paper summarizes a part of a more comprehensive study on DCB teat. The effect of specimen thickness on Klssc was evaluated. The results obtained using two different thicknesses are shown. Some considerations about the possiblecauses of the observed differences in Klssc values are presented. Besides, a method that allows to measure the crack growth in the DCB specimen is described. An ultrasonic technique we used for monitoring the crack extension.
Keywords sulfide stress cracking, SSC testing, double cantilever beam test, NACE TM0177-90, specimen thickness,steel, ultrasonic techniques, crack propagation.