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چکیده
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Herein, the effect of Nb content on the microstructure and electrochemical performance of cost-effective [FeNi]75−xCr15Mn10Nbx (x = 0, 5, 10 at%) high-entropy alloys (HEAs) in a 0.5 M H2SO4 environment was investigated. Upon the introduction of Nb into the [FeNi]75Cr15Mn10 alloy, the microstructure changed from a single face-centered cubic (FCC) solid solution to the dual-phase structures with FCC and [FeNiNb]-rich dendrites ([FeNi]70Cr15Mn10Nb5 and [FeNi]65Cr15Mn10Nb10 alloys). Also, the increase in Nb concentration leads to an increase in the [FeNiNb]-rich phase that ensures a greater formation of a stable and thicker passive oxide film. The findings emphasize the introducing Nb content was an effective strategy for improving the corrosion resistance of the cost-effective FeNiCrMn HEAs.
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