| Issue |
J. Phys. Colloques
Volume 48, Number C3, Septembre 1987
4th International Aluminium Lithium Conference
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|---|---|---|
| Page(s) | C3-709 - C3-716 | |
| DOI | https://doi.org/10.1051/jphyscol:1987382 | |
4th International Aluminium Lithium Conference
J. Phys. Colloques 48 (1987) C3-709-C3-716
DOI: 10.1051/jphyscol:1987382
Laboratoire de Thermodynamique et Physico-Chimie Métallurgiques, ENSEEG, Domaine Universitaire, B.P. 75, F-38402 Saint-Martin-d'Hères Cedex, France
J. Phys. Colloques 48 (1987) C3-709-C3-716
DOI: 10.1051/jphyscol:1987382
LOW CYCLE FATIGUE OF BINARY Al-Li ALLOYS. II-MICROSTRUCTURAL CHARACTERIZATION AND IN SITU FATIGUE EXPERIMENTS
Y. BRECHET, F. LOUCHET et J.L. VERGER-GAUGRYLaboratoire de Thermodynamique et Physico-Chimie Métallurgiques, ENSEEG, Domaine Universitaire, B.P. 75, F-38402 Saint-Martin-d'Hères Cedex, France
Abstract
The fatigue behaviour of AlLi binary alloys is investigated at the microscopic scale using T.E.M., STEM, and in situ fatigue in T.E.M. on specimens previously fatigued in torsion. In the Al0.7%Li solid solution, a cell structure is observed. The Al2.5%Li alloy with small precipitates exhibit precipitate free bands which reflect a strong localization. The Al2,5%Li alloys with large precipitates show Orowan by passing but also shearing by the Orowan Loops. The three types of mechanisms were observed also by in situ straining experiments in the T.E.M.