Effect of Corrosion Environment on Fatigue Crack Growth Behavior of Marine Steels
摘要
This work systematically investigated the da/dN of different micro-zones of S355/S420 welded joints in air and corrosion environment. The results indicated that the ability to resist crack propagation of base metal was better than that of welded metal. In addition, the da/dN at low stress intensity factor specimens in corrosion was slightly lower than that of specimens in air, which was revealed by the finite element method. The corresponding results indicated that the corrosion products were deposited on the crack surface, which would induce the stress close to the metallic yield stress at the crack tip, resulting in the low da/dN under corrosion.