| Title |
Effect of Different Mo Contents on Tensile and Corrosion Behaviors of CD4MCU Cast Duplex Stainless Steels |
| Authors |
장영환(Young Hwan Jang); 손진일(Jin Il Son); 김상식(Sang Shik Kim); 이재현(Je Hyun Lee) |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
CD4MCU cast duplex stainless steel; Mo contents; Tensile behavior; Corrosion behavior; Slow strain rate test |
| Abstract |
In the present study, the effect of Mo contents on the microstructure, tensile and corrosion behaviors of as-solutionized CD4MCU cast duplex stainless steel was examined. The polarization test was conducted in 3.5% NaCl +5% H₂SO_(4) aqueous solution for general corrosion resistance and the slow strain rate tests were also conducted in air and 3.5% NaC1+5% H₂SO_(4) aqueous solution to study the stress corrosion cracking (SCC) of the present alloy. A substantial microstructural evolution of CD4MCU cast duplex stainless steel was observed with different Mo contents, which in turn affected the tensile and corrosion behaviors significantly. The beneficial effect of Mo on improving the corrosion and the SCC resistances was largely overwhelmed by this variation of microstructural characteristics. The relationship between the microstructural evolution and the tensile and corrosion behavior of CD4MCU cast duplex stainless steels with different Mo contents was discussed based on the optical and SEM micrographic and fractographic observations. (Received September 2, 2004) |