High Temperature Strength of Three ODS Ferritic/ Martensitic Steels
Oxide dispersion strengthened (ODS) materials is leading candidates for blanket/first-wall structures of the fusion reactor. ODS materials for structure application in fusion rector would allow to increase the operating temperature to approximately 650. Therefore, this work focused on the optimization of metallurgical features to improve high temperature strength and elongation through understanding of contents of Cr and Al. In the study, the three kinds of ODS steels such as 19Cr-ODS (K1), 13Cr-Al-ODS (K2) and 19Cr-Al-ODS (K4) with Y2O3 content of 0.37wt% have been produced. And tensile test were performed on three ODS ferritic/martensitic steel between RT, 300, 400 and 600Dispersion hardening represents an interesting approach to improve the mechanical properties at elevated temperature, as they are foreseen in the future fusion reactor It has been successfully demonstrated that it is possible to expanse the temperature range for the application of fusion reactor.
S.W. Nam, Y.W. Chang, S.B. Lee and N.J. Kim
H. K. Yoon and A. Kimura , "High Temperature Strength of Three ODS Ferritic/ Martensitic Steels", Key Engineering Materials, Vols. 345-346, pp. 1011-1014, 2007