Relation Between the Morphology of Different-Nature Ductile Fractures and Properties of Structural Steels

Comparative analysis of the morphology of ductile fractures for a wide spectrum of products from structural steels (profiles, forgings, sheets), testing modes (tension, impact) and variants of cutting of specimens (longitudinal, tangential, and third-direction (over the thickness of the sheet) ones) is performed using the results of measurements. Informative components of ductile fractures connected with the observed differences in the toughness and in the ductility are determined. It is shown that the ductile fractures may be ranged objectively, which is required for solving problems of certification and control of the quality of metals.