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Microstructural stability of ODS-Eurofer and Eurofer-97 steels

Grant number: 11/07109-2
Support type:Scholarships abroad - Research
Effective date (Start): August 22, 2011
Effective date (End): February 21, 2012
Field of knowledge:Engineering - Materials and Metallurgical Engineering - Physical Metallurgy
Principal researcher:Hugo Ricardo Zschommler Sandim
Grantee:Hugo Ricardo Zschommler Sandim
Host: Dierk Raabe
Home Institution: Escola de Engenharia de Lorena (EEL). Universidade de São Paulo (USP). Lorena , SP, Brazil
Research place: Max Planck Society, Dusseldorf, Germany  

Abstract

The aim of the present project is to evaluate the microstructural stability of two Eurofer-type ferritic-martensitic steels. These steels are potential candidates for high-temperature structural applications in future ITER nuclear fusion reactors. One of them is an oxide dispersion strengthened steel named ODS-Eurofer steel. The second steel has chemical composition close to the ODS-Eurofer steel but without Y2O3 particles and it is named Eurofer-97. Two issues will be addressed in the present project: a) evaluation of the microstructural stability of ODS-Eurofer steel annealed at 800oC for long times (up to six months) to simulate accelerated life in service conditions with emphasis on the acting softening mechanisms (recovery, recrystallization and Ostwald ripening of particles); b) secondary recrystallization in Eurofer-97 steel with emphasis on nucleation and mesotexture of abnormal grains. Microstructural characterization will be performed using scanning electron microscopy (SEM) in the backscattered electrons mode and transmission electron microscopy (TEM. Microtexture and mesotexture can be evaluated by high-resolution electron backscatter diffraction (EBSD). (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
OLIVEIRA, V. B.; ZILNYK, K. D.; SANDIM, H. R. Z.. Thermodynamic Simulation of Reduced Activation Ferritic-Martensitic Eurofer-97 Steel. JOURNAL OF PHASE EQUILIBRIA AND DIFFUSION, v. 38, n. 3, p. 208-216, . (11/07109-2)

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