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Effects of Nitrogen and Tensile Direction on Stress Corrosion Cracking Susceptibility of Ni-Free FeCrMnC-Based Duplex Stainless Steelsopen access
- Issue Date
- Mar-2017
- Publisher
- MDPI AG
- Keywords
- duplex stainless steel; nitrogen; stress corrosion cracking; pitting corrosion
- Citation
- MATERIALS, v.10, no.3
- Indexed
- SCIE
SCOPUS
- Journal Title
- MATERIALS
- Volume
- 10
- Number
- 3
- ISSN
- 1996-1944
- Abstract
- Stress corrosion cracking (SCC) behavior of Ni-free duplex stainless steels containing N and C (Fe-balance-19Cr-8Mn-0.25C-(0.03,0.21) N, in wt %) was investigated by using a slow strain rate test (SSRT) in air and aqueous NaCl solution with different tensile directions, including parallel (longitudinal) and perpendicular (transverse) to the rolling direction. It was found that alloying N was effective in increasing the resistance to SCC, while it was higher along the longitudinal direction than the transverse direction. The SCC susceptibility of the two alloys was assessed based on the electrochemical resistance to pitting corrosion, the corrosion morphology, and the fractographic analysis.
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