TC10 - Lecture 4
Factors affecting the crack initiation and the crack propagation of pipeline steels transporting hydrocarbons
Crucial step in materials degradation is the determination of the failure mechanism. As for example, environmentally assisted cracks (EAC) in linepipe steels are initiated either as a result of stresses in combination with environmental effects, as in stress corrosion cracking (SCC), or as a result of trapped hydrogen in the steel (HE). The complexity of both (SCC and HE) cracking phenomena results from their dependence on multiple metallurgical, mechanical, and environmental parameters that may all influence both crack initiation and propagation.