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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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Gomes, Inês Varela
University of Minho
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2023Impact of the ultrasonic-assisted casting of an AlSi7Mg alloy on T6 heat treatmentcitations
- 2023On the aging kinetics of a flame-resistant AZ91D-1.5%Ca magnesium alloy processed with ultrasonic vibrationcitations
- 2023Ultrasound-assisted casting of AZ91D-1.5%Ca – Shifting T4 paradigm for downstream processingcitations
- 2023Shielding AZ91D-1%Ca from corrosion through ultrasound melt treatment: a study for stent designcitations
- 2023Experimental Analysis of Heat Transfer at the Interface between Die Casting Molds and Additively Manufactured Cooling Insertscitations
- 2022Magnesium stents manufacturing: experimental application of a novel hybrid thin-walled investment casting approachcitations
- 2021Ultrasonic Treatment as the Route for Grain Refinement of Mg-Al Alloys: A Systematic Reviewcitations
- 2017Finite element analysis of stent expansion: influence of stent geometry on performance parameterscitations
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article
Impact of the ultrasonic-assisted casting of an AlSi7Mg alloy on T6 heat treatment
Abstract
In this work, the effect of ultrasonic vibration during solidification on the aging kinetics of an AlSi7Mg alloy is investigated. With the ultrasonic equipment coupled to the mold walls, melt treatment was performed by two approaches: (i) fully above liquidus (>635 ◦C); and (ii) in the full range between liquidus and solidus (630 ◦C→ 550 ◦C). Cast samples were then subjected to T6 heat treatment for different aging times. It is shown that indirect ultrasound treatment increases the cooling rate while active. The eutectic Si was refined and further modified when ultrasound treatment was performed in the semisolid state. Due to the significant release of solute during the decomposition of π-Al8FeMg3Si6 into fine β-Al5FeSi, this has a significant impact in the solution stage. Ultrasound treatment fully above liquidus decreased the underaging time to 50% and peak aging time to 25% without compromising strength. The results suggest aging kinetics are correlated with a higher vacancy density and solute enrichment which favors Guinier–Preston (GP) zone formation. These findings show a promising route to tailor the aging kinetics in these alloys by selectively modifying phases and cooling rates ; This work was supported by PTDC/EMEEME/30967/2017 and NORTE-0145-FEDER 030967, co-financed by the European Regional Development Fund (ERDF), through the Operational Programme for Competitiveness and Internationalization (COMPETE 2020), under Portugal 2020, and by the Fundação para a Ciência e a Tecnologia–FCT IPP national funds. Moreover, this work was supported by Portuguese FCT under the project UIDB/04436/2020 and the doctoral grants PD/BD/140094/2018 and 2020.08564.BD.