Loading rate effect on ductile crack resistance of steels using precracked Charpy specimens

While loading rate effects were extensively investigated in the transition regime where fracture occurs in a brittle manner, they are comparatively much less studied in the ductile regime. The main objective of this paper is to provide experimental data on the effect of loading rate on the ductile fracture behavior and examine the relation that might exist between the various material properties. In particular, the crack resistance behavior of two ferritic steels, A533B plate and 20MnMoNi55 forging, at quasi-static and dynamic (impact) loading rates was examined.