Effect of Structural State and Temperature on Crack Generation and Propagation Resistance in Pipe Steels

Effect of Structural State on Tendency Towards Stress Corrosion Cracking of Ultralow-Carbon Martensitic and Low-Alloy Pipe Steels

“…First, a high reserve of toughness and ductility does not guarantee and increase in SCC resistance under conditions of steel impregnation with hydrogen. Second, as is known from work [2,4,12] and from the research results obtained the fine structure of test ULMS is distinguished by a high degree of dispersion, and most important homogeneity. It may be proposed that latter is the main factor governing an increase in SSC resistance for these steels under conditions of hydrogen presence within them.…”

“…Evaluation of tendency towards SCC was conducted from results of testing with different deformation rates in air and in a corrosive medium with hydrogen impregnation with construction of the dependences of failure resistance parameters on deformation rate [3,5,12].…”

“…-work for crack generation A g , whose value in tests at slow rates in fact reflects to work for stable crack generation and propagation;-overall work for failure A Σ , whose value during SCC tests reflects the work for stable crack generation, propagation, and failure[10,12].…”