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자료유형
학술저널
저자정보
Dileep Chandran Ramachandran (Dong-Eui University) Siva Prasad Murugan (Dong-Eui University) Young‑Min Kim (Korea Institute of Industrial Technology) Dongcheol Kim (Korea Institute of Industrial Technology) Gwang‑Gook Kim (Korea Institute of Industrial Technology) Dae‑Geun Nam (Korea Institute of Industrial Technology) Chanyoung Jeong (Dong-Eui University) Yeong Do Park (Dong-Eui University)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.26 No.9
발행연도
2020.1
수록면
1,341 - 1,353 (13page)

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The corrosion behavior of fusion zones (FZ-1: 5.39 Mg–0.66Mn, FZ-2: 5.49 Mg–0.35Mn, and FZ-3: 5.72 Mg–0.32Mn)of AA5083 alloy welded with high Mg-containing Al–Mg filler wires has been systematically investigated. An extensivemicrostructural characterization was performed to evaluate the localized corrosion properties of the fusion zones. Thepotentiodynamic polarization test and salt spray test showed that the corrosion resistance decreases with increasing Mg content,therefore, the corrosion resistance of FZ-3 is lower than that of the FZ-1 and FZ-2. The electron microscopic analysisafter intermittent corrosion test revealed that the eutectic β-phase (Al3Mg2) was responsible for the initiation of corrosion. The corrosion behavior of each microstructural constituents was related to the dissolution potentials of the correspondingmicrostructures; hence, it forms galvanic couple with the Al matrix. Moreover, high Mg content in the filler wire lead to theformation of additional β-phase in the fusion zone. However, intermetallics such as Al6(Fe,Mn) and Mg2Siwere significantonly during the later stages of corrosion.

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