Corrosion Fatigue and Dynamic Strain Aging of Duplex Stainless Steel in Aqueous solution

Authors

Chuan-Ming Tseng, Department of Materials Science and Engineering,National Cheng Kung University, Tainan 70101,China ;
I-Hsuang Lo, Department of Materials Science and Engineering,National Cheng Kung University, Tainan 70101,China ;
Wen-Ta Tsai, Department of Materials Science and Engineering,National Cheng Kung University, Tainan 70101,China ;

Corresponding Author

Wen_Ta Tsai

Abstract

The corrosion fatigue and dynamic strain aging behaviors of 22%Cr duplex stainless steel (DSS) in sodium chloride solutions were investigated. Austenitic 316L SS and ferrtic 430 SS were also used in this study for a comparison. The experimental results showed that no stress corrosion cracking (SCC) occurred in all these SSs tested in 3.5wt% NaCl solution at 80 ℃. However, dynamic strain aging (DSA) occurred in 316L austenitic SS and 22%Cr DSS during slow strain rate testing (SSRT) in this solution.The occurrence of DSA was dependent on solution temperature,strain rate and the presence of austenitic phase. The corrosion rate of fatigue crack growth (FCG) in 3.5wt% NaCl solution was found to be the highest for 430 ferritic SS.The high FCG rate in 430 SS was associated with brittle failure caused by hydrogen embrittlement.For 22%Cr DSS,accelerated FCG in NaCl solution was attributed to hydrogen embrittlement of the constituent ferrite phase.

Keywords

Duplex stainless steel, Corrosion fatigue, Dynamic strain aging, Stress corrosion cracking, Hydrogen embrittlement

DOI Link

https://doi.org/10.61558/2993-074X.1514

Publication Date

2003-08-28

Online Available Date

2003-08-28

Revised Date

2003-08-28

Received Date

2003-08-28

Recommended Citation

Chuan-Ming Tseng, I-Hsuang Lo, Wen-Ta Tsai. Corrosion Fatigue and Dynamic Strain Aging of Duplex Stainless Steel in Aqueous solution[J]. Journal of Electrochemistry, 2003 , 9(3): 265-271.
DOI: 10.61558/2993-074X.1514
Available at: https://jelectrochem.xmu.edu.cn/journal/vol9/iss3/2

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