Prediction Model for Atmospheric Stress Corrosion Cracking of Stainless Steel

Abstract

The analyses present the result whereby the initiation lifetime of atmospheric stress corrosion cracking, ASCC is 1.1 years under the following conditions of repair-welded joints: surface residual stress in the axial direction of the welded joints of 362 MPa, residual stress in the thickness of 200 MPa, degree of sensitization, Ra, of 20%, and density of adhesion salt of 0.1 g/m2 [NaCl]. According to the relationship of da/dt-K, it is considered likely that the cracks initiated would penetrate the thickness of 20 mm within 7.6 years or so.