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Abstract : We have investigated the influence of aging on the morphology and phase composition of annealed Al-Li binary alloys by means of an atom probe with a multi-detection system. The influence of artifacts such as the preferential evaporation of the Li-atoms and the pile-up effects for the Al-atoms were analysed as well. Specimens of Al- 2.0 wt%Li and Al -2.9 wt%Li were solution treated and aged at 190°C and 150°C for several times. δ-precipitates were observed by FIM and their composition as well as the Li-content of the matrix were obtained by performing AP analysis for the different heat treatments.





Autor: T. Al-Kassab A. Menand P. Auger P. Haasen

Fuente: https://hal.archives-ouvertes.fr/



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