Abstract
High entropy alloys (HEAs) have a wide spectrum of applications. Many researches investigate Fe-rich high entropy alloy (HEA). However, few authors deal with Cu-rich HEA. Therefore, this research discusses a novel non-equiatomic Cu40Mn25Al20Fe5Co5Ni5 HEA with a superior corrosion resistance, which is made by liquid metallurgy route. The alloy was prepared via casting in an electric resistance furnace under protective atmosphere. The as-cast alloy microstructure was experimentally characterized by optical microscopy, scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), mapping of the elemental distribution, and x-ray diffraction (XRD). The corrosion behavior of Cu40Mn25Al20Fe5Co5Ni5 HEA was investigated using the weight-loss method and potentiodynamic polarization tests. The corrosion properties of the alloy were studied in different concentrations of 0.5, 1, 5 and 10% HNO3 acid solutions. The corroded Cu40Mn25Al20Fe5Co5Ni5 HEA samples were examined by SEM, EDS, and mapping of elements distribution. The results were concluded that the novel Cu40Mn25Al20Fe5Co5Ni5 HEA exhibits good corrosion performance when immersed in different concentrations of 0.5, 1, 5 and 10% nitric acid. Finally, alloy item selection and process parameter control are new research topics that hold the promise of future HEAs study.
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Aly, H.A., Abdelghafar, K.A., Gaber, G.A. et al. Fabrication, Characterization, and Corrosion Behavior of a New Cu40Mn25Al20Fe5Co5Ni5 High-Entropy Alloy in HNO3 Solution. J. of Materi Eng and Perform 30, 1430–1443 (2021). https://doi.org/10.1007/s11665-020-05390-9
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DOI: https://doi.org/10.1007/s11665-020-05390-9