Abstract
The behavior of the metal of welded joints and low-alloy low-carbon steel in the process of impact bending is studied from the point of view of energy partitioning due to crack growth process. It is shown that for metal with different microstructures there are significant differences in the degree of deformation before the formation of a brittle crack. The relationship between the work spent before the formation of a brittle crack and the overall work of fracture is shown. Statistical data confirming the increased susceptibility of the metal of welded joints to early formation of brittle cracks are presented. It is shown that the destruction of the metal of welded joints takes place with a large spent of energy on the final fracture of the specimen relative to the base metal.
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