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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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Li, Jiehua
Montanuniversität Leoben
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (19/19 displayed)
- 2024Semi-analytical and experimental heat input study of additively manufactured Zr-based bulk metallic glasscitations
- 2024Investigation on the Duration of Action of Mg3N2 as a Grain Refiner for AZ80 Alloycitations
- 2023Effect of Ca and P on the Size and Morphology of Eutectic Mg2Si in High-Purity Al-Mg-Si Alloyscitations
- 2023Revealing effects of solute Ta on solidification and precipitation of Al-7Si-0.3Mg based alloyscitations
- 2023Effect of Mn addition on microstructure, mechanical properties and die soldering of rheocasting Al-7Si-0.3Mg alloys
- 2023Effect of Eu and P additions with Ta grain refiner on the solidification microstructure of Al-7Si-0.3Mg alloyscitations
- 2023Silicon Poisoning and Effects of Tantalum on AlSi Alloyscitations
- 2023A Comparison of Microstructure and Casting Defects of Rheocasting and Thixocasting Al-Si-Mg Alloy
- 2022Using Recycled Materials for Semi-Solid Processing of Al-Si-Mg Based Alloys
- 2022Effect of Solute Ta on Grain Refinement of Al-7Si-0.3Mg Based Alloyscitations
- 2022Elucidation of formation and transformation mechanisms of Ca-rich Laves phase in Mg-Al-Ca-Mn alloyscitations
- 2021The nucleation sequence of α-Al on TiB2 particles in Al-Cu alloyscitations
- 2021Einfluss von Tantal auf die Kornfeinung einer Al10SiMg Legierung
- 2019Eutectic modification by ternary compound cluster formation in Al-Si alloyscitations
- 2019Precipitation microstructure in Al-Si-Mg-Mn alloy with Zr additionscitations
- 2017Phase Decomposition of a Single-Phase AlTiVNb High-Entropy Alloy after Severe Plastic Deformation and Annealingcitations
- 2017The enhanced theta-prime (θ′) precipitation in an Al-Cu alloy with trace Au additionscitations
- 2016Revealing heterogeneous nucleation of primary Si and eutectic Si by AlP in hypereutectic Al-Si alloyscitations
- 2014Influence of dendritic morphology on the calculation of macrosegregation in steel ingotcitations
Places of action
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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.