A Novel Fracture Mechanics Approach to Determine the Threshold Stress Intensity Factor in Corrosive Environment

This paper investigates the method to determine the KISCC of grade 250 steel and simulated heat affected zone (SHAZ) in 30% caustic solution at 100oC using CNT technique. Stress corrosion cracking has been confirmed using scanning electron microscope. Crack growth rate in caustic solution has been determined by CNT technique.