Study of Microstructure, Hydrogen Solubility, and Corrosion of Ta-Modified Zr–1Nb Alloys for Nuclear Applications
| Autor: | Ferreirós, P. A., Polack, E. C.Savoy, Lanzani, L. A., Alonso, P. R., Quirós, D. P., Mieza, J. I., Zelaya, E., Knowles, A. J., Rubiolo, G. H. |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Ferreirós, P A, Polack, E C S, Lanzani, L A, Alonso, P R, Quirós, D P, Mieza, J I, Zelaya, E, Knowles, A J & Rubiolo, G H 2022, Study of Microstructure, Hydrogen Solubility, and Corrosion of Ta-Modified Zr–1Nb Alloys for Nuclear Applications . in TMS 2022 151st Annual Meeting and Exhibition Supplemental Proceedings . Springer, Minerals, Metals and Materials Series, pp. 1352-1362, 151st Annual Meeting and Exhibition of The Minerals, Metals and Materials Society, TMS 2022, Anaheim, United States, 27/02/22 . https://doi.org/10.1007/978-3-030-92381-5_129 |
| Popis: | Modified Zr–1Nb alloys with Ta additions is a potential strategy to improve structural alloys for nuclear reactors. The effects of Ta on microstructural stability and resistance to corrosion of Zr–1Nb alloys were systematically investigated and elucidated. The (α+ β) microstructure in Zr–1.05Nb, Zr–0.85Nb–0.20Ta, and Zr–0.85Nb–0.40Ta (wt.%) alloys were obtained with the following two thermomechanical processes after a water quenching from βZr: (a) annealed at 570 °C for 3840 h and (b) a combination of intermediate annealing temperatures and cold rolled steps. Quantitative EDS-TEM analysis together with DSC measurements were used to characterise the changes in phase compositions and the fraction of beta-phase precipitates. Hydrogen solubility was measured in alloys with the first annealed condition. The Ta additions increase the monotectic transformation temperature, improves the steam corrosion at 400 °C and 10 MPa up to 14 days, and decreases slightly the hydrogen solubility. The higher thermal microstructural stability compared to Ta-free Zr–1Nb alloys provides potential advantages for increases in operating temperature or acceleration of precipitation kinetics during thermomechanical processing. |
| Databáze: | OpenAIRE |
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