Microstructure and mechanical properties of hypoeutectic Al–6Ce–3Ni-0.7Fe (wt.%) alloy.
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| Title: | Microstructure and mechanical properties of hypoeutectic Al–6Ce–3Ni-0.7Fe (wt.%) alloy. |
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| Authors: | Wu, Tiffany1 (AUTHOR) TiffanyWu2024@u.northwestern.edu, Plotkowski, Alex2 (AUTHOR) plotkowskiaj@ornl.gov, Shyam, Amit2 (AUTHOR) shyama@ornl.gov, Dunand, David C.1 (AUTHOR) dunand@northwestern.edu |
| Source: | Materials Science & Engineering: A. Jun2023, Vol. 875, pN.PAG-N.PAG. 1p. |
| Subjects: | Hypereutectic alloys, Eutectic alloys, Microstructure, Creep (Materials), High temperatures, Thermal stability, Alloys |
| Abstract: | A hypoeutectic, Fe-modified Al–Ce–Ni alloy (Al–6Ce–3Ni-0.7Fe, wt.%) is studied in terms of microstructure, thermal stability, ambient temperature strengthening, and creep resistance. The as-cast microstructure consists of primary Al dendrites and interdendritic binary eutectic regions (Al–Al 11 Ce 3 and/or Al–Al 9 (Fe,Ni) 2), with micron/submicron lamellar spacing, depending on the location along the height of the ingot. The cast alloy exhibits excellent coarsening resistance at 400 °C, with mostly unchanged microstructure and microhardness after 6 weeks of aging, indicating good thermal stability of Al 11 Ce 3 and Al 9 (Fe,Ni) 2. Orowan strengthening and load transfer are identified as strengthening mechanisms at ambient and elevated temperature. A high volume fraction of the intermetallic phases (providing load transfer) and relatively coarse eutectic spacing (for modest Orowan strengthening) result in a moderate as-cast microhardness of 566 ± 32 MPa. Creep resistance at 300 and 350 °C is similar to a binary Al-12.5Ce eutectic alloy (with twice the Ce content) because of two countering effects: Al–6Ce–3Ni-0.7Fe shows a higher volume fraction of strengthening intermetallic phases, but it also exhibits a large fraction of primary Al dendrites which weaken the alloy. By contrast, the alloy, when laser-remelted at the surface, has a fully eutectic microstructure without primary aluminum dendrites achieved by high undercooling on solidification, with a refined network of eutectic phases that doubles the microhardness as compared to the cast alloy. Whereas coarsening is faster due to the shorter diffusion distances between the eutectic phases, hardness remains ∼30% higher than the as-cast alloy after ∼6 weeks aging at 400 °C. [ABSTRACT FROM AUTHOR] |
| Copyright of Materials Science & Engineering: A is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 163846300 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Microstructure and mechanical properties of hypoeutectic Al–6Ce–3Ni-0.7Fe (wt.%) alloy. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Wu%2C+Tiffany%22">Wu, Tiffany</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> TiffanyWu2024@u.northwestern.edu</i><br /><searchLink fieldCode="AR" term="%22Plotkowski%2C+Alex%22">Plotkowski, Alex</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> plotkowskiaj@ornl.gov</i><br /><searchLink fieldCode="AR" term="%22Shyam%2C+Amit%22">Shyam, Amit</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> shyama@ornl.gov</i><br /><searchLink fieldCode="AR" term="%22Dunand%2C+David+C%2E%22">Dunand, David C.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> dunand@northwestern.edu</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Materials+Science+%26+Engineering%3A+A%22">Materials Science & Engineering: A</searchLink>. Jun2023, Vol. 875, pN.PAG-N.PAG. 1p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Hypereutectic+alloys%22">Hypereutectic alloys</searchLink><br /><searchLink fieldCode="DE" term="%22Eutectic+alloys%22">Eutectic alloys</searchLink><br /><searchLink fieldCode="DE" term="%22Microstructure%22">Microstructure</searchLink><br /><searchLink fieldCode="DE" term="%22Creep+%28Materials%29%22">Creep (Materials)</searchLink><br /><searchLink fieldCode="DE" term="%22High+temperatures%22">High temperatures</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+stability%22">Thermal stability</searchLink><br /><searchLink fieldCode="DE" term="%22Alloys%22">Alloys</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: A hypoeutectic, Fe-modified Al–Ce–Ni alloy (Al–6Ce–3Ni-0.7Fe, wt.%) is studied in terms of microstructure, thermal stability, ambient temperature strengthening, and creep resistance. The as-cast microstructure consists of primary Al dendrites and interdendritic binary eutectic regions (Al–Al 11 Ce 3 and/or Al–Al 9 (Fe,Ni) 2), with micron/submicron lamellar spacing, depending on the location along the height of the ingot. The cast alloy exhibits excellent coarsening resistance at 400 °C, with mostly unchanged microstructure and microhardness after 6 weeks of aging, indicating good thermal stability of Al 11 Ce 3 and Al 9 (Fe,Ni) 2. Orowan strengthening and load transfer are identified as strengthening mechanisms at ambient and elevated temperature. A high volume fraction of the intermetallic phases (providing load transfer) and relatively coarse eutectic spacing (for modest Orowan strengthening) result in a moderate as-cast microhardness of 566 ± 32 MPa. Creep resistance at 300 and 350 °C is similar to a binary Al-12.5Ce eutectic alloy (with twice the Ce content) because of two countering effects: Al–6Ce–3Ni-0.7Fe shows a higher volume fraction of strengthening intermetallic phases, but it also exhibits a large fraction of primary Al dendrites which weaken the alloy. By contrast, the alloy, when laser-remelted at the surface, has a fully eutectic microstructure without primary aluminum dendrites achieved by high undercooling on solidification, with a refined network of eutectic phases that doubles the microhardness as compared to the cast alloy. Whereas coarsening is faster due to the shorter diffusion distances between the eutectic phases, hardness remains ∼30% higher than the as-cast alloy after ∼6 weeks aging at 400 °C. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Materials Science & Engineering: A is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.msea.2023.145072 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 1 StartPage: N.PAG Subjects: – SubjectFull: Hypereutectic alloys Type: general – SubjectFull: Eutectic alloys Type: general – SubjectFull: Microstructure Type: general – SubjectFull: Creep (Materials) Type: general – SubjectFull: High temperatures Type: general – SubjectFull: Thermal stability Type: general – SubjectFull: Alloys Type: general Titles: – TitleFull: Microstructure and mechanical properties of hypoeutectic Al–6Ce–3Ni-0.7Fe (wt.%) alloy. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Wu, Tiffany – PersonEntity: Name: NameFull: Plotkowski, Alex – PersonEntity: Name: NameFull: Shyam, Amit – PersonEntity: Name: NameFull: Dunand, David C. IsPartOfRelationships: – BibEntity: Dates: – D: 06 M: 06 Text: Jun2023 Type: published Y: 2023 Identifiers: – Type: issn-print Value: 09215093 Numbering: – Type: volume Value: 875 Titles: – TitleFull: Materials Science & Engineering: A Type: main |
| ResultId | 1 |
