Intergranular Corrosion and Stress Corrosion Cracking of AA2024-T3

摘要

The kinetics of intergranular stress corrosion cracks and the relation to the kinetics of intergranular corrosion were studied by foil penetration experiments on AA2024-T3 samples subjected to a uniaxial tensile stress. Samples with various orientations relative to the rolling direction were studied in 1.0 M NaCl at an applied anodic potential. The applied stress increased the rate of penetration relative to the rate for unstressed samples. The penetrated samples were further characterized using X-ray microfocal radiography and optical cross sectioning. The cracks for certain orientations were found to have interesting and unexpected morphologies.