[1H14-21] ODS Structure materials Ni alloys

[1H19] R&D of fuel cladding of ODS ferritic steel for maintaining fuel integrity at accidental high temperature condition (2)

(5)Order phase formation due to 8-15 wt.% Al addition in Fe-Cr-Al ferritic steels

＊Bikas Maji¹, Shigeharu Ukai¹, Naoko Oono¹, Takeji Kaito², Tadahiko Torimaru³, Akihiko Kimura⁴, Shigenari Hayashi⁵ (1.Hokkaido University, 2.Japan Atomic Energy Agency, 3.Nippon Nuclear Fuel Development Co., LTD., 4.Kyoto University, 5.Tokyo Institute of Technology)

Keywords:ODS steels, Cladding tube material, Microstructural stability, Embrittlement

The embrittlement issue associated with the formation of Fe-Al intermetallic order phases has been investigated in Fe-Cr-Al ferritic steels. The Fe-(12-17)Cr-(8-15)Al-0.5Ti-0.5Y₂O₃ (wt.%) ODS ferritic steels were produced by mechanical alloying followed by spark plasma sintering and their microstructural stability and mechanical property have been evaluated after ageing at 475^oC up to 1000 h.