Investigation of SCC of high strength aluminum alloys by means of slow strain rate test and cyclic anodic polarization in combination

摘要

From the combination of SSRT and corrosion/repassivation sequences: 1. Decrease of the strain rate and of the yield strength regardless the electrochemical perturbation 2. Stress relaxation/recovery events induced with anodic polarization cycle Under nearly-stationary conditions (slow strain and potential scan rates): a. Crack nucleation and propagation enhanced during anodic dissolution b. Stress recovery time dependent on crack morphology c. Correlation between the repassivation behavior and the characteristics of stress relaxation/recovery events.