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Precipitation in original Duralumin A-U4G versus modern 2017A alloy

Brunet, Magali and Malard, Benoît and Ratel-Ramond, Nicolas and Deshayes, Christophe and Joulié, Sébastien and Warot-Fonrose, Bénédicte and Sciau, Philippe and Douin, Joël and De Geuser, Frédéric and Deschamps, Alexis Precipitation in original Duralumin A-U4G versus modern 2017A alloy. (2019) Materialia, 8. 100429. ISSN 2589-1529

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Official URL: https://doi.org/10.1016/j.mtla.2019.100429

Abstract

Precipitation in Duralumin, a historic quaternary alloy of the type: Al–Cu–Mg–Si, was never fully studied nor observed by current electron microscopy techniques. This article presents the full characterization and comparison of two alloys: a Duralumin (A-U4G) from the 1950s collected on a vintage aircraft and its modern equivalent: a 2017A alloy. The as-received and peak-aging states were analysed with DSC, SAXS and TEM advanced techniques. It is shown that old Duralumin and modern 2017A present a similar nanoprecipitation in the as-received state and behave similarly upon artificial aging. As opposed to what has been reported in the past, three types of precipitates participating in hardening were found upon aging: θ’-Al2Cu, Q’(Q)-AlCuMgSi and Ω-Al2Cu.

Item Type:Article
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > Institut polytechnique de Grenoble (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Laboratory name:
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Deposited By: cirimat webmestre
Deposited On:02 Dec 2019 13:01

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