[1H14-21] ODS 構造材 ニッケル合金

[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)

キーワード：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.