Improving the Effectiveness of the Solid-Solution-Strengthening Elements Mo, Re, Ru and W in Single-Crystalline Nickel-Based Superalloys
Tailoring the partitioning behavior of solid solution strengtheners is a crucial design strategy for advanced Ni-based superalloys. The goal of this study was to maximize the enrichment of Mo, Re, Ru and W in the γ-matrix phase. To determine the composition dependency of the partitioning behavior, a...
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MDPI AG
2021-10-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/11/11/1707 |
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| author | Tobias Gaag Nils Ritter Alexandra Peters Nicklas Volz Daniel Gruber Steffen Neumeier Christopher Zenk Carolin Körner |
| author_facet | Tobias Gaag Nils Ritter Alexandra Peters Nicklas Volz Daniel Gruber Steffen Neumeier Christopher Zenk Carolin Körner |
| author_sort | Tobias Gaag |
| collection | DOAJ |
| description | Tailoring the partitioning behavior of solid solution strengtheners is a crucial design strategy for advanced Ni-based superalloys. The goal of this study was to maximize the enrichment of Mo, Re, Ru and W in the γ-matrix phase. To determine the composition dependency of the partitioning behavior, a set of polycrystalline superalloys with varying contents of these solid solution-strengthening elements and a W-containing single-crystalline alloy series with varying concentrations of the γ′-forming elements Ta and Ti was produced. Assessed properties include phase compositions by electron-probe micro-analysis, phase transformation temperatures by differential scanning calorimetry and creep behavior. Re exhibits the most pronounced enrichment in the γ-matrix, followed by Mo, Ru and W. Due to the preference of the Al-sites in the γ′-phase in the order Ta > Ti > W > Mo > Re, the solid solution strengthening elements Mo, Re and W are displaced from the γ′-phase by increasing Ti and Ta contents. The investigated solutes do not directly influence the partitioning behavior of Ru as it prefers Ni-sites in the γ′-phase. Compressive creep experiments reveal a correlation between the content of solid solution strengtheners in the γ-phase and creep performance. |
| first_indexed | 2024-03-10T05:17:06Z |
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| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T05:17:06Z |
| publishDate | 2021-10-01 |
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| spelling | doaj.art-c0c8bb6e0d04422d9ae66c3d7e1f2f9b2023-11-23T00:22:21ZengMDPI AGMetals2075-47012021-10-011111170710.3390/met11111707Improving the Effectiveness of the Solid-Solution-Strengthening Elements Mo, Re, Ru and W in Single-Crystalline Nickel-Based SuperalloysTobias Gaag0Nils Ritter1Alexandra Peters2Nicklas Volz3Daniel Gruber4Steffen Neumeier5Christopher Zenk6Carolin Körner7Institute II (WTM), Department of Materials Science & Engineering, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), 91058 Erlangen, GermanyInstitute II (WTM), Department of Materials Science & Engineering, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), 91058 Erlangen, GermanyInstitute II (WTM), Department of Materials Science & Engineering, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), 91058 Erlangen, GermanyInstitute I, Department of Materials Science & Engineering, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), 91058 Erlangen, GermanyInstitute II (WTM), Department of Materials Science & Engineering, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), 91058 Erlangen, GermanyInstitute I, Department of Materials Science & Engineering, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), 91058 Erlangen, GermanyInstitute II (WTM), Department of Materials Science & Engineering, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), 91058 Erlangen, GermanyInstitute II (WTM), Department of Materials Science & Engineering, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), 91058 Erlangen, GermanyTailoring the partitioning behavior of solid solution strengtheners is a crucial design strategy for advanced Ni-based superalloys. The goal of this study was to maximize the enrichment of Mo, Re, Ru and W in the γ-matrix phase. To determine the composition dependency of the partitioning behavior, a set of polycrystalline superalloys with varying contents of these solid solution-strengthening elements and a W-containing single-crystalline alloy series with varying concentrations of the γ′-forming elements Ta and Ti was produced. Assessed properties include phase compositions by electron-probe micro-analysis, phase transformation temperatures by differential scanning calorimetry and creep behavior. Re exhibits the most pronounced enrichment in the γ-matrix, followed by Mo, Ru and W. Due to the preference of the Al-sites in the γ′-phase in the order Ta > Ti > W > Mo > Re, the solid solution strengthening elements Mo, Re and W are displaced from the γ′-phase by increasing Ti and Ta contents. The investigated solutes do not directly influence the partitioning behavior of Ru as it prefers Ni-sites in the γ′-phase. Compressive creep experiments reveal a correlation between the content of solid solution strengtheners in the γ-phase and creep performance.https://www.mdpi.com/2075-4701/11/11/1707Ni-based superalloyscreepsolid solution strengtheningpartitioning behaviorDSCCALPHAD |
| spellingShingle | Tobias Gaag Nils Ritter Alexandra Peters Nicklas Volz Daniel Gruber Steffen Neumeier Christopher Zenk Carolin Körner Improving the Effectiveness of the Solid-Solution-Strengthening Elements Mo, Re, Ru and W in Single-Crystalline Nickel-Based Superalloys Metals Ni-based superalloys creep solid solution strengthening partitioning behavior DSC CALPHAD |
| title | Improving the Effectiveness of the Solid-Solution-Strengthening Elements Mo, Re, Ru and W in Single-Crystalline Nickel-Based Superalloys |
| title_full | Improving the Effectiveness of the Solid-Solution-Strengthening Elements Mo, Re, Ru and W in Single-Crystalline Nickel-Based Superalloys |
| title_fullStr | Improving the Effectiveness of the Solid-Solution-Strengthening Elements Mo, Re, Ru and W in Single-Crystalline Nickel-Based Superalloys |
| title_full_unstemmed | Improving the Effectiveness of the Solid-Solution-Strengthening Elements Mo, Re, Ru and W in Single-Crystalline Nickel-Based Superalloys |
| title_short | Improving the Effectiveness of the Solid-Solution-Strengthening Elements Mo, Re, Ru and W in Single-Crystalline Nickel-Based Superalloys |
| title_sort | improving the effectiveness of the solid solution strengthening elements mo re ru and w in single crystalline nickel based superalloys |
| topic | Ni-based superalloys creep solid solution strengthening partitioning behavior DSC CALPHAD |
| url | https://www.mdpi.com/2075-4701/11/11/1707 |
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