| Numéro |
J. Phys. Colloques
Volume 48, Numéro C3, Septembre 1987
4th International Aluminium Lithium Conference
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|---|---|---|
| Page(s) | C3-769 - C3-775 | |
| DOI | https://doi.org/10.1051/jphyscol:1987390 | |
4th International Aluminium Lithium Conference
J. Phys. Colloques 48 (1987) C3-769-C3-775
DOI: 10.1051/jphyscol:1987390
1 Université de Technologie de Compiègne, CNRS-UA 849, B.P. 233, Rue P. de Roberval, F-60206 Compiègne Cedex, France
2 Aérospatiale, Laboratoire Central, 12, Rue Pasteur, F-92152 Suresnes Cedex, France
J. Phys. Colloques 48 (1987) C3-769-C3-775
DOI: 10.1051/jphyscol:1987390
FACTORS OF CRACK INITIATION AND MICROCRACK PROPAGATION IN ALUMINUM LITHIUM 2091 AND IN ALUMINUM 2024
L. FARCY1, C. CARRE2, M. CLAVEL1, Y. BARBAUX2 et D. ALIAGA21 Université de Technologie de Compiègne, CNRS-UA 849, B.P. 233, Rue P. de Roberval, F-60206 Compiègne Cedex, France
2 Aérospatiale, Laboratoire Central, 12, Rue Pasteur, F-92152 Suresnes Cedex, France
Abstract
Initiation and microcrack propagation stages were investigated by optical microscopic observations of fatigue darnage. The differences observed at high fatigue lives on S-N curves are found to correlate with the nature of initiation sites. It is shown that microcrack growth rates are equivalent for both 2024 T351 and 2091 T8 alloys, though long crack growth rates for 2091 T8 are lower as compared to those of 2024 T351.