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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Bourgeois, Laure
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2021Dual Photolytic Pathways in an Alloyed Plasmonic Near-perfect Absorber: Implications for Photoelectrocatalysiscitations
- 2017The bi-layered precipitate phase ζ in the Al-Ag alloy systemcitations
- 2017The enhanced theta-prime (θ′) precipitation in an Al-Cu alloy with trace Au additionscitations
- 2014Particle evolution in Mg-Zn-Zr alloy processed by integrated extrusion and equal channel angular pressingcitations
- 2012A simple route to full structural analysis of biophosphates and their application to materials discoverycitations
- 2011Quantitative microscopic measurement of void distribution in shear bands in Zr(66.7)Cu(33.3) metallic glasscitations
- 2011High surface area templated LiFePO4 from a single source precursor moleculecitations
- 2002Boron nitride nanotube, nanocable and nanoconecitations
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article
The enhanced theta-prime (θ′) precipitation in an Al-Cu alloy with trace Au additions
Abstract
Linking the atomic level kinetic precipitation pathways induced by elemental additions to the resulting microstructure is fundamentally desirable for the design of new classes of light alloys. Aberration-corrected scanning transmission electron microscopy (AC-STEM) and first principles calculations were used to investigate the influence of trace Au (200 ppm) additions on precipitation in an Al-Cu-Au alloy. These Au additions resulted in a significant enhancement of the low-temperature age hardening, which was demonstrated to be associated with accelerated precipitate nucleation and growth. Atomic-resolution annular dark field (ADF) imaging showed the clearly reduced critical length and thickness of θ′ precipitates with Au additions, therefore accelerating the nucleation of θ′. Agglomerated Au clusters were observed in θ′ precipitates, which were demonstrated to correspond to a localised energetically favourable state. These observations have been explained through first-principles calculations and relevant thermodynamic modelling. This work provides a potential way to refine the alloy microstructure for improving the mechanical behaviour of light alloys.