Annealing behavior of ferritic–martensitic 9%Cr–ODS–Eurofer steel
Oxide dispersion strengthened ferritic–martensitic steels are potential candidates for applications in future fusion power plants. High creep resistance, good oxidation resistance, reduced neutron activation and microstructural long-term stability at temperatures of about 650–700 °C are required in...
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Published in | Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 527; no. 15; pp. 3602 - 3608 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Kidlington
Elsevier B.V
01.06.2010
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | Oxide dispersion strengthened ferritic–martensitic steels are potential candidates for applications in future fusion power plants. High creep resistance, good oxidation resistance, reduced neutron activation and microstructural long-term stability at temperatures of about 650–700
°C are required in this context. In order to evaluate its thermal stability in the ferritic phase field, samples of the reduced activation ferritic–martensitic 9%Cr–ODS–Eurofer steel were cold rolled to 50% and 80% reductions and further annealed in vacuum from 300 to 800
°C for 1
h. The characterization in the annealed state was performed by scanning electron microscopy in the backscattered electron mode, high-resolution electron backscatter diffraction and transmission electron microscopy. Results show that the fine dispersion of Y-based particles (about 10
nm in size) is effective to prevent recrystallization. The low recrystallized volume fraction (<0.1) is associated to the nuclei found at prior grain boundaries and around large M
23C
6 particles. Static recovery was found to be the predominant softening mechanism of this steel in the investigated temperature range. |
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ISSN: | 0921-5093 1873-4936 |
DOI: | 10.1016/j.msea.2010.02.051 |