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Atom probe tomography and transmission electron microscopy characterisation of precipitation in an Al-Cu-Li-Mg-Ag alloy |
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| Authors: | Gault B de Geuser F Bourgeois L Gabble B M Ringer S P Muddle B C |
| Affiliation: | a Department of Materials, University of Oxford, Oxford, UK b Australian Centre for Microscopy & Microanalysis, The University of Sydney, Sydney, Australia c SIMaP, Grenoble INP-UJF-CNRS, Saint-Martin-d'H[1]ères, France d Monash Centre for Electron Microscopy, Monash University, Australia e ARC Centre of Excellence for Design in Light Metals, Australia f Department of Materials Engineering, Monash University, Australia g The Aerospace Corporation, El Segundo,CA 90245,USA |
| Abstract: | State-of-the art atom probe tomography (APT) combined with transmission electron microscopy (TEM) were used to investigate the microstructure at different stages of the ageing process of an alloy of composition (at%) Al-1.68%Cu-4.62%Li-0.33%Mg-0.1%Ag. These alloys were shown to exhibit a complex microstructure of T1 plates and several metastable phases, including θ′ and S. We will highlight the early stages of clustering, precipitate interactions and possible solute segregation at the matrix/precipitate interfaces and detail the chemical composition of the different phases. |
| Keywords: | Atom probe tomography Aluminium alloys Local magnification |
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