Creep rupture properties of bare and coated polycrystalline nickel-based superalloy Rene®80
The mechanism governing de-oxidation of vanadium metal is regarded as fundamental knowledge; however, it has not been elucidated in existing literature. In this paper, the thermodynamic data of V-H-O systems were summarized, and the Gibbs free energies of the main compounds were calculated. Conseque...
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University of Belgrade, Technical Faculty, Bor
2021-01-01
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| Series: | Journal of Mining and Metallurgy. Section B: Metallurgy |
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| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-5339/2021/1450-53392100036B.pdf |
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| author | Barjesteh M.M. Abbasi S.M. Zangeneh-Madar K. Shirvani K. |
| author_facet | Barjesteh M.M. Abbasi S.M. Zangeneh-Madar K. Shirvani K. |
| author_sort | Barjesteh M.M. |
| collection | DOAJ |
| description | The mechanism governing de-oxidation of vanadium metal is regarded as fundamental knowledge; however, it has not been elucidated in existing literature. In this paper, the thermodynamic data of V-H-O systems were summarized, and the Gibbs free energies of the main compounds were calculated. Consequently, the de-oxidation limits of different reductants in a VO system were evaluated, namely: Si, Al, and Mg. It was observed that Si could not remove an O content of less than 7.27 wt% from V. However, Al was the stronger reducing agent; it could remove O contents of up to 0.01 and 0.1 wt% at 800 and 1050°C, respectively. Nevertheless, Mg exhibited the best reducing properties as it could remove less than 0.01 wt% of O at 1100°C. The addition of H2 rendered the V-O solid solution unstable to a certain extent, thereby indicating that H2 facilitated de-oxygenation. Furthermore, the results obtained by analyzing the equilibrium conditions were in accordance with the results of the de-oxidation limit in the V-O system. In other words, this study demonstrated that oxygen in vanadium can be effectively controlled by changing the reductant dosage and temperature. |
| format | Article |
| id | doaj-art-5a5aa6cfceb44663baef78ad7d5cd100 |
| institution | Kabale University |
| issn | 1450-5339 2217-7175 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | University of Belgrade, Technical Faculty, Bor |
| record_format | Article |
| series | Journal of Mining and Metallurgy. Section B: Metallurgy |
| spelling | doaj-art-5a5aa6cfceb44663baef78ad7d5cd1002025-02-02T09:23:36ZengUniversity of Belgrade, Technical Faculty, BorJournal of Mining and Metallurgy. Section B: Metallurgy1450-53392217-71752021-01-0157340141210.2298/JMMB201203036B1450-53392100036BCreep rupture properties of bare and coated polycrystalline nickel-based superalloy Rene®80Barjesteh M.M.0Abbasi S.M.1Zangeneh-Madar K.2Shirvani K.3Malek Ashtar University of technology (MUT), Faculty of Material and Manufacturing Technologies, Tehran, IranMalek Ashtar University of technology (MUT), Faculty of Material and Manufacturing Technologies, Tehran, IranMalek Ashtar University of technology (MUT), Faculty of Material and Manufacturing Technologies, Tehran, IranIranian research organization for science and technology (IROST), Department of advanced materials and new energies, Tehran, IranThe mechanism governing de-oxidation of vanadium metal is regarded as fundamental knowledge; however, it has not been elucidated in existing literature. In this paper, the thermodynamic data of V-H-O systems were summarized, and the Gibbs free energies of the main compounds were calculated. Consequently, the de-oxidation limits of different reductants in a VO system were evaluated, namely: Si, Al, and Mg. It was observed that Si could not remove an O content of less than 7.27 wt% from V. However, Al was the stronger reducing agent; it could remove O contents of up to 0.01 and 0.1 wt% at 800 and 1050°C, respectively. Nevertheless, Mg exhibited the best reducing properties as it could remove less than 0.01 wt% of O at 1100°C. The addition of H2 rendered the V-O solid solution unstable to a certain extent, thereby indicating that H2 facilitated de-oxygenation. Furthermore, the results obtained by analyzing the equilibrium conditions were in accordance with the results of the de-oxidation limit in the V-O system. In other words, this study demonstrated that oxygen in vanadium can be effectively controlled by changing the reductant dosage and temperature.http://www.doiserbia.nb.rs/img/doi/1450-5339/2021/1450-53392100036B.pdfrene®80platinum-aluminidecreep rupturelarson-miller parameterfractography |
| spellingShingle | Barjesteh M.M. Abbasi S.M. Zangeneh-Madar K. Shirvani K. Creep rupture properties of bare and coated polycrystalline nickel-based superalloy Rene®80 Journal of Mining and Metallurgy. Section B: Metallurgy rene®80 platinum-aluminide creep rupture larson-miller parameter fractography |
| title | Creep rupture properties of bare and coated polycrystalline nickel-based superalloy Rene®80 |
| title_full | Creep rupture properties of bare and coated polycrystalline nickel-based superalloy Rene®80 |
| title_fullStr | Creep rupture properties of bare and coated polycrystalline nickel-based superalloy Rene®80 |
| title_full_unstemmed | Creep rupture properties of bare and coated polycrystalline nickel-based superalloy Rene®80 |
| title_short | Creep rupture properties of bare and coated polycrystalline nickel-based superalloy Rene®80 |
| title_sort | creep rupture properties of bare and coated polycrystalline nickel based superalloy rene r 80 |
| topic | rene®80 platinum-aluminide creep rupture larson-miller parameter fractography |
| url | http://www.doiserbia.nb.rs/img/doi/1450-5339/2021/1450-53392100036B.pdf |
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