Effect of Cu/Li Ratio on Porosity and Microstructural Evolution of Gravity and Squeeze-Cast Al–Cu–Li Alloys
Abstract The present study investigates the effect of the Cu/Li ratio on the porosity and microstructural evolution of two Al–Cu–Li alloys manufactured through gravity and squeeze-cast routes. The alloy with Cu/Li ~ 4 exhibits a unique compositional segregation pattern and a higher degree of preferred crystallographic orientation than the alloy with Cu/Li ~ 2, regardless of the manufacturing method (gravity or squeeze cast). A specific segregation pattern in alloy with Cu/Li ~ 4 occurs due to the preferential precipitation of Cu-rich $ Al_{2} $Cu and $ Al_{2} $CuLi precipitates and strong texture along the component $$\{113\}\langle 5\overline{8 }1\rangle $$. Homogenization of gravity and squeeze-cast alloys reduces segregation, but the alloys produced through the squeeze-cast route have more capability to reduce segregation. The alloy with a Cu/Li ratio ~ 4 displays less response to the post-cast homogenization treatment than the alloy with a Cu/Li ratio ~ 2. The X-ray micro-computed tomography study reveals that the Cu/Li ratio greatly influences the internal and surface porosities, and it is higher for the gravity-cast alloy with Cu/Li ~ 2 than Cu/Li ~ 4. Squeeze casting helps to eliminate most of the porosities in alloys with a Cu/Li ~ 2 but leaves a considerable number of porosities in alloys with a Cu/Li ~ 4..
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:55 |
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| Enthalten in: |
Metallurgical and materials transactions - 55(2024), 2 vom: 29. Feb., Seite 1117-1133 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Manojkumar, S. [VerfasserIn] |
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| Links: |
Volltext [lizenzpflichtig] |
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| Anmerkungen: |
© The Minerals, Metals & Materials Society and ASM International 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. |
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| doi: |
10.1007/s11663-024-03028-y |
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| funding: |
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| Förderinstitution / Projekttitel: |
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SPR055211534 |
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| 520 | |a Abstract The present study investigates the effect of the Cu/Li ratio on the porosity and microstructural evolution of two Al–Cu–Li alloys manufactured through gravity and squeeze-cast routes. The alloy with Cu/Li ~ 4 exhibits a unique compositional segregation pattern and a higher degree of preferred crystallographic orientation than the alloy with Cu/Li ~ 2, regardless of the manufacturing method (gravity or squeeze cast). A specific segregation pattern in alloy with Cu/Li ~ 4 occurs due to the preferential precipitation of Cu-rich $ Al_{2} $Cu and $ Al_{2} $CuLi precipitates and strong texture along the component $$\{113\}\langle 5\overline{8 }1\rangle $$. Homogenization of gravity and squeeze-cast alloys reduces segregation, but the alloys produced through the squeeze-cast route have more capability to reduce segregation. The alloy with a Cu/Li ratio ~ 4 displays less response to the post-cast homogenization treatment than the alloy with a Cu/Li ratio ~ 2. The X-ray micro-computed tomography study reveals that the Cu/Li ratio greatly influences the internal and surface porosities, and it is higher for the gravity-cast alloy with Cu/Li ~ 2 than Cu/Li ~ 4. Squeeze casting helps to eliminate most of the porosities in alloys with a Cu/Li ~ 2 but leaves a considerable number of porosities in alloys with a Cu/Li ~ 4. | ||
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