Effects of potential and loading frequency on corrosion fatigue behavior of 2205 duplex stainless steel

被引：6
作者：
Tsai, W. -T. [1 ]
Lo, I. -H. [1 ]
机构：
[1] Natl Cheng Kung Univ, Dept Mat Sci & Engn, Tainan 70101, Taiwan
来源：
CORROSION | 2008年 / 64卷 / 02期
关键词：
corrosion fatigue; duplex stainless steel; loading frequency; selective dissolution;
D O I：
10.5006/1.3280684
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Corrosion fatigue behavior of 2205 duplex stainless steel (DSS [UNS S31803]) in 2 M sulfuric acid (H2SO4) + 0.7 M hydrochloric acid (HCl) solution at various loading frequencies and under selective dissolution conditions was investigated. The mechanical and chemical effects on the fatigue crack initiation as well as crack propagation were analyzed using micrographical examination. The experimental results showed that the fatigue life in the mixed acid solution was frequency-dependent, and almost one order of magnitude lower than that in air at 1 Hz. The micrographical examinations indicated that selective dissolution of the constituent phase could affect the fatigue crack initiation process in a complicated manner. The fracture surface morphology could also be modified by selective dissolution, the extent to which was dependent on loading frequency.
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页码：155 / 163
页数：9
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