Castable eutectic Ni–Ce high temperature alloys strengthened by γ/γʹ microstructure
Ni-based superalloys are the premier material for high-temperature applications but are often difficult to manufacture via solidification-based processing. Eutectic alloys typically possess good castability due to narrow solidification ranges. The Ni–Ce system possesses a eutectic reaction but has n...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-01-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423033276 |
| _version_ | 1827368251525431296 |
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| author | Syeda Bushra Haider Elizabeth Heon Max Neveau Peiyong Chen Austin Houston Orlando Rios Eric A. Lass |
| author_facet | Syeda Bushra Haider Elizabeth Heon Max Neveau Peiyong Chen Austin Houston Orlando Rios Eric A. Lass |
| author_sort | Syeda Bushra Haider |
| collection | DOAJ |
| description | Ni-based superalloys are the premier material for high-temperature applications but are often difficult to manufacture via solidification-based processing. Eutectic alloys typically possess good castability due to narrow solidification ranges. The Ni–Ce system possesses a eutectic reaction but has never been examined as a potential high-temperature material. This work investigates the microstructure and mechanical properties of near-eutectic alloys Ni–17Ce and Ni–17Ce–5Al (wt.%). Both alloys show outstanding high-temperature microstructure and mechanical property stability at 900 °C. The formation of Ni3Al (γʹ) precipitates is observed in the primary FCC-Ni phase of the ternary Ni–Ce–Al alloy. The precipitation hardened ternary alloy exhibits superior hardness to Inconel 718 at elevated temperatures, retaining its strength to 750 °C, or about 50 °C higher than Inconel 718. The novel hierarchical microstructure consisting of thermally stable eutectic regions combined with γʹ-strengthened primary FCC-Ni and eutectic phases show great promise as a castable material solution for high-temperature applications. |
| first_indexed | 2024-03-08T09:28:52Z |
| format | Article |
| id | doaj.art-70043c3e18ec4aa0aafba07017a39b26 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-08T09:28:52Z |
| publishDate | 2024-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-70043c3e18ec4aa0aafba07017a39b262024-01-31T05:44:20ZengElsevierJournal of Materials Research and Technology2238-78542024-01-012839433950Castable eutectic Ni–Ce high temperature alloys strengthened by γ/γʹ microstructureSyeda Bushra Haider0Elizabeth Heon1Max Neveau2Peiyong Chen3Austin Houston4Orlando Rios5Eric A. Lass6Department of Materials Science and Engineering, The University of Tennessee Knoxville, USADepartment of Materials Science and Engineering, The University of Tennessee Knoxville, USADepartment of Materials Science and Engineering, The University of Tennessee Knoxville, USADepartment of Materials Science and Engineering, The University of Tennessee Knoxville, USADepartment of Materials Science and Engineering, The University of Tennessee Knoxville, USADepartment of Materials Science and Engineering, The University of Tennessee Knoxville, USACorresponding author.; Department of Materials Science and Engineering, The University of Tennessee Knoxville, USANi-based superalloys are the premier material for high-temperature applications but are often difficult to manufacture via solidification-based processing. Eutectic alloys typically possess good castability due to narrow solidification ranges. The Ni–Ce system possesses a eutectic reaction but has never been examined as a potential high-temperature material. This work investigates the microstructure and mechanical properties of near-eutectic alloys Ni–17Ce and Ni–17Ce–5Al (wt.%). Both alloys show outstanding high-temperature microstructure and mechanical property stability at 900 °C. The formation of Ni3Al (γʹ) precipitates is observed in the primary FCC-Ni phase of the ternary Ni–Ce–Al alloy. The precipitation hardened ternary alloy exhibits superior hardness to Inconel 718 at elevated temperatures, retaining its strength to 750 °C, or about 50 °C higher than Inconel 718. The novel hierarchical microstructure consisting of thermally stable eutectic regions combined with γʹ-strengthened primary FCC-Ni and eutectic phases show great promise as a castable material solution for high-temperature applications.http://www.sciencedirect.com/science/article/pii/S2238785423033276Castable superalloyHigh-temperature applicationsPrecipitation hardeningEutecticThermal stabilityHot hardness |
| spellingShingle | Syeda Bushra Haider Elizabeth Heon Max Neveau Peiyong Chen Austin Houston Orlando Rios Eric A. Lass Castable eutectic Ni–Ce high temperature alloys strengthened by γ/γʹ microstructure Journal of Materials Research and Technology Castable superalloy High-temperature applications Precipitation hardening Eutectic Thermal stability Hot hardness |
| title | Castable eutectic Ni–Ce high temperature alloys strengthened by γ/γʹ microstructure |
| title_full | Castable eutectic Ni–Ce high temperature alloys strengthened by γ/γʹ microstructure |
| title_fullStr | Castable eutectic Ni–Ce high temperature alloys strengthened by γ/γʹ microstructure |
| title_full_unstemmed | Castable eutectic Ni–Ce high temperature alloys strengthened by γ/γʹ microstructure |
| title_short | Castable eutectic Ni–Ce high temperature alloys strengthened by γ/γʹ microstructure |
| title_sort | castable eutectic ni ce high temperature alloys strengthened by γ γ microstructure |
| topic | Castable superalloy High-temperature applications Precipitation hardening Eutectic Thermal stability Hot hardness |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423033276 |
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