STRESS-CORROSION CRACKING OF 2 ALUMINUM-ALLOYS - A COMPARISON BETWEENEXPERIMENTAL-OBSERVATIONS AND DATA-BASED ON MODELING

The effect of stress intensity and temperature on the stress corrosion crack growth rates of a 7XXX [AlZnMg(Cu)] and a 2XXX (AlCu) aluminium alloy was measured in water and aqueous salt solutions. Several model s of stress corrosion cracking were taken from the literature and are reviewed briefly. These models are based on anodic dissolution, hydrog en embrittlement or enhanced surface mobility. The experimental data a re compared with the predicted crack growth rates with the aim of disc riminating between the rate-controlling processes of stress corrosion cracking for aluminium alloys in aqueous solutions. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.