Impact of the Ultrasonic-Assisted Casting of an AlSi7Mg Alloy on T6 Heat Treatment
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...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-01-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/13/2/255 |
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| author | Inês V. Gomes José Grilo Vitor H. Carneiro Hélder Puga |
| author_facet | Inês V. Gomes José Grilo Vitor H. Carneiro Hélder Puga |
| author_sort | Inês V. Gomes |
| collection | DOAJ |
| description | 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 <i>β</i>-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. |
| first_indexed | 2024-03-11T08:25:07Z |
| format | Article |
| id | doaj.art-5e729225361444579d34cecc3c787ab2 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-11T08:25:07Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-5e729225361444579d34cecc3c787ab22023-11-16T22:06:49ZengMDPI AGMetals2075-47012023-01-0113225510.3390/met13020255Impact of the Ultrasonic-Assisted Casting of an AlSi7Mg Alloy on T6 Heat TreatmentInês V. Gomes0José Grilo1Vitor H. Carneiro2Hélder Puga3CMEMS—UMinho, University of Minho, 4800-058 Guimarães, PortugalCMEMS—UMinho, University of Minho, 4800-058 Guimarães, PortugalMetRics—UMinho, University of Minho, 4800-058 Guimarães, PortugalCMEMS—UMinho, University of Minho, 4800-058 Guimarães, PortugalIn 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 <i>β</i>-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.https://www.mdpi.com/2075-4701/13/2/255AlSi7Mgultrasound treatmentintermetallicsolutionaging |
| spellingShingle | Inês V. Gomes José Grilo Vitor H. Carneiro Hélder Puga Impact of the Ultrasonic-Assisted Casting of an AlSi7Mg Alloy on T6 Heat Treatment Metals AlSi7Mg ultrasound treatment intermetallic solution aging |
| title | Impact of the Ultrasonic-Assisted Casting of an AlSi7Mg Alloy on T6 Heat Treatment |
| title_full | Impact of the Ultrasonic-Assisted Casting of an AlSi7Mg Alloy on T6 Heat Treatment |
| title_fullStr | Impact of the Ultrasonic-Assisted Casting of an AlSi7Mg Alloy on T6 Heat Treatment |
| title_full_unstemmed | Impact of the Ultrasonic-Assisted Casting of an AlSi7Mg Alloy on T6 Heat Treatment |
| title_short | Impact of the Ultrasonic-Assisted Casting of an AlSi7Mg Alloy on T6 Heat Treatment |
| title_sort | impact of the ultrasonic assisted casting of an alsi7mg alloy on t6 heat treatment |
| topic | AlSi7Mg ultrasound treatment intermetallic solution aging |
| url | https://www.mdpi.com/2075-4701/13/2/255 |
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