Effect of Deformation on Cleavage Crack Initiation in the Heat-Affected Zone of Microalloyed Pipeline Steels
摘要
Abstract—Based on the results of multiple impact bending and static tension tests obtained using a unique technique, we determine the possible causes of the scatter of impact toughness values and their bimodal distribution for low-carbon microalloyed pipeline steel with a simulated microstructure of the heat-affected zone of a welded joint. The influence of the second phases, namely, complex nonmetallic inclusions based on titanium–niobium nitride and containing aluminum oxide and calcium sulfide, is shown.