On the Toughness Evaluation of Sulphide-Controlled Fe 510 Steel by Charpy-V-Impact, Fracture Mechanics, and Wide Plate Tests

CC(T) Specimen Load-Bearing Capacity Related to Yield Strength and Upper-Shelf Charpy-V Energy

“…The T-stress underestimates very low Q values and overestimates very high values, but in the range Q = −1 to 0, the estimates generally differ less than 0.2, which is of the same order as the uncertainty in the parameter estimates. This provides validation for the use of Equation (12) to describe the constraint effect for ductile fracture. The constraint effect data in Figure 3 are verified only to a J/JT>0 ratio of 2.…”

“…In addition, in this case, the maximum net section stress is lower than expected, similar to the 30 mm-thick plate data. For comparison, a test result for a similar-strength Fe510 steel with identical flaw size (2a = 15 mm) and plate thickness (15 mm) [12] is included in Figure 17. The behavior of the Fe510 steel is similar to those of all the other steels in the study.…”

“…The T-stress underestimates very low Q values a overestimates very high values, but in the range Q = −1 to 0, the estimates generally di less than 0.2, which is of the same order as the uncertainty in the parameter estimates. T provides validation for the use of Equation (12) to describe the constraint effect for duc fracture. Figure 5 shows a comparison of the yield stress-normalized elastic T-stress corresponding to limit load and the Q value corresponding to the load at J IC , where the Q values have been collected from the references leading to Figure 3.…”

“…Figure17. Proportional net section stress as a function of specimen width for 15 mm thick specimens with fixed flaw size, 2a = 15 mm[11,12].…”