| Abstract: | Influence of stress on the sensitivity of an austenitic chromium-nickel steel to stress corrosion cracking The transcrystalline stress corrosion cracking of a chromium-nickel steel (German designation X 5 CrNi I8 9) in 35 % magnesium chloride solution at 150°C exhibits a well defined limit at the 0.01 %yield stress. In the range of intermediate stresses the stress corrosion resistance increases as the load is increased. This behaviour may be interpreted in terms of the time required for the formation of stable cracks. This mechanism apparently follows the gliding step-repassivation model involving a reduction in height of the gliding steps and the influence of a cathodic protection due to the reduction of the mixed potential. |
