|About this Abstract
||Materials Science & Technology 2012
||Symposium on the Fatigue of Materials II: Advances and Emergences in Understanding
||Ultrasonic Corrosion Fatigue Behavior of High Strength Austenitic Stainless Steels
||Ryuichiro Ebara, Yuki Yamaguchi, Daisuke Kanei, Yohei Yamamoto
|On-Site Speaker (Planned)
Ultrasonic corrosion fatigue tests were conducted for high strength austenitic stainless steels such as 2.5% Mo containing austenitic stainless steel,YUS270 and SUS304N2 in 3%NaCl aqueous solution. The reduction of giga-cycle corrosion fatigue strength of solution treated and TMCP made 2.5Mo containing austenitic stainless steel was 12.1% and 19.5%, respectively. The reduction of giga-cycle corrosion fatigue strength of YUS270 and SUS304N2 was not observed at all, while the reduction of corrosion fatigue life was observed at higher stress amplitude. Corrosion pit was observed on corrosion fatigue crack initiation area. Striation was predominantly observed on crack propagation area in air and in 3% NaCl aqueous solution. It can be concluded that the reduction of corrosion fatigue strength of high strength austenitic stainless steels is due to the corrosion pit formation at corrosion fatigue crack initiation area.
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