Effects of Aluminum on Delayed Fracture Properties of Ultra High Strength Low Alloy TRIP-aided Steels
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概要
- 論文の詳細を見る
To improve the delayed fracture strength of ultra high-strength low alloy TRIP-aided steels with bainitic ferrite matrix (TBF steels), the effects of aluminum content on hydrogen absorption behavior and delayed fracture properties of 0.2%C–0.2–1.5%Si–1.5%Mn TBF steel were investigated. When aluminum was added to the TBF steel, the diffusible hydrogen increased. It was expected that the hydrogen was charged not only in retained austenite films but also on lath boundary. Delayed fracture strength of TBF steels containing aluminum were significantly increased, compared with conventional TBF steel. This was mainly caused by (1) suppression of the stress-assisted martensite transformation resulting from the stabilized or carbon-enriched retained austenite, (2) hydrogen trapping to refined interlath retained austenite films and lath boundary, and (3) relaxation of localized stress concentration by TRIP effect of the retained austenite.
- 社団法人 日本鉄鋼協会の論文
- 2008-06-15
著者
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IKEDA Shushi
Materials Research Laboratory, Kobe Steel Ltd.
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Sugimoto Koh-ichi
Department Of Pharmacology Division Of Clinical Pharmacology Jichi Medical School
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Ikeda Shushi
Mater. Research Lab. Kobe Steel Ltd.
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Ikeda Shushi
Mater. Res. Lab. Kobe Steel Ltd.
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Hojo Tomohiko
Dept. Mech. Engng. Tsuyama National Coll. Of Technol.
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Hojo Tomohiko
Dept. Mech. Engng. Tsuyama National College Of Technology
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Sugimoto Koh-ichi
Dept. Mech. Syst. Engng. Shinshu Univ.
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Mukai Youichi
Research & Development Labs. Kobe Steel Ltd.
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Sugimoto K
Dept. Mech. Syst. Engng. Shinshu Univ.
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