Equimolar AlCuFeMn: A novel oxidation resistant alloy
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Date
2021
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Abstract
High-temperature oxidation behavior of an equimolar AlCuFeMn multicomponent alloy was investigated at 500 �C and 1000 �C for 50 h of exposure in ambiance. Relative weight gain after oxidation was 0.5 mg cm?2 and 0.3 mg cm?2 at 500 �C and 1000 �C, respectively. At 500 �C, the oxidized surface comprised of a manganese-rich oxide layer with an aluminum oxide sublayer, while only an aluminum-rich oxide layer was observed at 1000 �C. The alloy microstructure was temperature stable and consisted of an FCC, BCC, and a minor Al11Mn4 phase. The alloy's oxidation resistance compared well with 9% Cr steel and nickel-based superalloys suitable for high-temperature applications. � 2021 Elsevier Ltd
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Keywords
High entropy alloys; Microstructure; Orientation imaging microscopy; Oxidation
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