Oxide-Dispersion Strengthened Radiation-Resistant Steels

Resumo

The better characteristics of the long-term strength of the EP-450-ODS (oxide dispersion strengthened) steel are determined compared to the well-known oxygen-free reactor steels. Using the Mössbauer analysis of the deformed powder mixture ⁵⁶Fe₃O₄ + ⁵⁷Fe, the possibility of the deformation-induced dissolution of iron oxides in the steel matrix, which makes it possible to obtain high quality ODS steels in the process of subsequent high-temperature annealing (sintering), is shown. The enhanced strength characteristics are obtained in recrystallized samples of ODS iron (YS_0.2 ~ 570 MPa, UTS ~ 632 MPa) in the absence of any other alloying elements except for oxygen of air.