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High Temperature Strength and Oxidation Resistance of ODS Ferritic Steels.

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成田 健; 鵜飼 重治  ; 大塚 智史   ; 皆藤 威二 ; 松田 恭司*

Narita, Takeshi; Ukai, Shigeharu; Otsuka, Satoshi; Kaito, Takeji; Matsuda, Yasushi*

実用化段階のFBRの燃料被覆管材料として有望なODS鋼の高温強度および酸化試験を行った。その結果、ODS鋼は従来のPNC316よりも長時間側でのクリープ特性が優れており、目標強度も達成していること、Ti増量により更に強度が増すこと、および耐高温酸化性もPNC316と同等であることを明らかにした。

High temperature creep and oxidation tests are conducted, since the high temperature strength and oxidation resistance for the ODS ferritic steel are required for its applicability.As a result, It is identified that 9Cr-ODS martensitic steel demonstrated adquate creep strength at 973K, further titanum addition significantly improved the creep strength in 9Cr-ODS martensitic steel, and 9Cr-ODS martensitic and 12Cr-ODS ferritic steels have superior high temperature oxidation resistance compared to PNC-FMS and SUS430.

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