J. Phys. Colloques
Volume 48, Numéro C3, Septembre 19874th International Aluminium Lithium Conference
|Page(s)||C3-785 - C3-791|
J. Phys. Colloques 48 (1987) C3-785-C3-791
FATIGUE CRACK PROPAGATION BEHAVIOUR OF THE Al-Li ALLOY 8090 COMPARED TO 2024M. PETERS, V. BACHMANN et K. WELPMANN
DFVLR, Institut für Werkstoff-Forschung, D-5000 Köln 90, F.R.G.
The fatigue crack propagation behaviour of the Al-Li alloy 8090 was evaluated on 25mm plate material and compared to the conventional high strength Al alloy 2024. Tests were performed in air and 3.5% NaCl solution at R-ratios of 0.1 and 0.7. The results revealed that for most conditions the Al-Li alloy was equivalent or better than the conventional Al alloy. The superior behaviour of 8090 was shown to be primarily a result of crack closure.