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논문 기본 정보

자료유형
학술저널
저자정보
Zequn Zhang (University of Science and Technology Beijing) Qijuan Dong (University of Science and Technology Beijing) Zhibin Chen (University of Science and Technology Beijing) Junsheng Wu (University of Science and Technology Beijing) Jiuyang Xia (University of Science and Technology Beijing) Kang Huang (University of Science and Technology Beijing) Pengcheng Zuo (University of Science and Technology Beijing) Wei Xue (University of Science and Technology Beijing) Bowei Zhang (University of Science and Technology Beijing)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.30 No.2
발행연도
2024.2
수록면
360 - 369 (10page)
DOI
10.1007/s12540-023-01513-8

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초록· 키워드

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The influence of Co content on the microstructure and corrosion behavior of Al0.3CoxCrFeNi (x = 0.25, 0.5 and 1.0) highentropy alloys were investigated. The results indicated that the increased content of Co improve the corrosion resistanceof alloy, which can be attributed to the distinction of phase composition in alloys caused by different Co content. TheAl0.3CoxCrFeNi alloy shows a double-phase (FCC + BCC) structure for x = 0.25 and 0.5, and BCC phase consists of (Al,Ni)-rich B2 phase and (Cr, Fe, Co)-rich A2 phase. The increase of Co content induces the transformations of crystalstructuresfrom BCC to FCC, resulting in the decrease of BCC phase proportion. The Al0.3CoCrFeNi alloy exhibits thesingle FCC structure, and all elements tend to be homogeneously distributed. The difference in the potential of FCC andBCC phases indicates the BCC phase acts as anode resulting to localized corrosion, while B2 phase preferentially dissolvescompared to the A2 phase due to the lower potential. Therefore, the existence of selective corrosion is found in thealloys with double-phase, by contrast, the alloy with single FCC phase shows random pitting corrosion.

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