Annealing effects on microstructure and coercive field of ferritic-martensitic ODS Eurofer steel |
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Authors: | R.A. RenzettiH.R.Z. Sandim,M.J.R. SandimA.D. Santos,A. Mö slangD. Raabe |
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Affiliation: | a Escola de Engenharia de Lorena - USP, 12600-970 Lorena, SP, Brazil b Instituto de Física - USP, 05314-970 São Paulo, SP, Brazil c Karlsruher Institut für Technologie (KIT), IMF I, D-72061 Karlsruhe, Germany d Max-Planck Institut für Eisenforschung (MPI-E), D-40237 Düsseldorf, Germany |
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Abstract: | Oxide dispersion strengthened reduced-activation ferritic-martensitic steels are promising candidates for applications in future fusion power plants. Samples of a reduced activation ferritic-martensitic 9 wt.%Cr-oxide dispersion strengthened Eurofer steel were cold rolled to 80% reduction in thickness and annealed in vacuum for 1 h from 200 to 1350 °C to evaluate its thermal stability. Vickers microhardness testing and electron backscatter diffraction (EBSD) were used to characterize the microstructure. The microstructural changes were also followed by magnetic measurements, in particular the corresponding variation of the coercive field (Hc), as a function of the annealing treatment. Results show that magnetic measurements were sensitive to detect the changes, in particular the martensitic transformation, in samples annealed above 850 °C (austenitic regime). |
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Keywords: | Steel Magnetic measurements Coercive field Recrystallization EBSD ODS |
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