Microstructural evolution during ageing of Al–Cu–Li–x alloys
By V. Araullo-Peters, Baptiste Gault, F. Geuser, Alexis Deschamps, J. Cairney. 2014
236 citations recorded by the source corpus.
Abstract In this study, atom probe tomography was used to investigate the microstructure of the alloy AA2198 (Al–1.35 Cu–3.55 Li–0.29 Mg–0.08 Ag) over a range of ageing conditions to examine the evolution of phases in the alloy, in particular aiming to reveal the nucleation mechanism of the strengthening T 1 phase. T 1 precursor phases were observed from early ageing, most of which were connected to dislocations enriched with Mg and Ag. This Mg solute segregation on the dislocations was subsequently observed to develop into S-like phases. Ag and Mg segregation to T 1 interfaces was systematically observed when the plates were oriented perpendicular to the probing direction. The matrix solute content was followed during the course of T 1 precipitation. It was found that the evolution of Cu, Li, Mg and Ag was similar, giving additional evidence for their co-precipitation.
Subfields: Aerospace Engineering, Biomedical Engineering, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/0d0ec47eea6e7db5645ed7bf8ae3e253b9dc8d3d
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Citations in the corpus
- Alloys for Aeronautic Applications: State of the Art and Perspectives (2019, background): “F r example, a high Li content favors the form tion of the etastable δ’ phase [27], while Mg leads to the precipitates ty ically present in the Al-Cu-Mg alloys, namely Guinier–Preston–Baga yatsky (GPB) zone , S’/S [37,38].”