Issue
J. Phys. Colloques
Volume 48, Number C3, Septembre 1987
4th International Aluminium Lithium Conference
Page(s) C3-817 - C3-822
DOI https://doi.org/10.1051/jphyscol:1987396
4th International Aluminium Lithium Conference

J. Phys. Colloques 48 (1987) C3-817-C3-822

DOI: 10.1051/jphyscol:1987396

FATIGUE CRACK INITIATION AND PROPAGATION PROPERTIES OF AL-Li-Cu ALLOYS IN AIR AND IN AQUEOUS CORROSIVE SOLUTIONS

T. MAGNIN1, P. RIEUX1, C. LESPINASSE2 et C. BATHIAS2

1  Ecole des Mines, 158 Cours Fauriel, F-42023 Saint-Etienne Cedex, France
2  Université de Technologie de Compiègne, Département Génie Mécanique, B.P 233, F-60206 Compiègne Cedex, France


Abstract
Fatigue tests are performed on an Al-Li-Cu CP271 alloy in air and indifferent corrosive solutions on smooth and notched specimens to determine the crack initiation and crack propagation properties of the CP271 alloy in the peak aged conditions. Crack propagation properties are shown to be very interesting in regards with the conventional Al-Zn-Mg alloys. Crack initiation properties are shown to be very sensitive to the texture of the specimens both in air and in a 3.5% NaCl solution. The anodic dissolution accelerates crack initiation in the corrosive solution but the corresponding reduction of the fatigue life is less important than for conventional Al-Zn-Mg alloys.