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Title
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Elucidating the effect of grain refinement and crystallographic texture on electrochemical properties of cost-effective Fe40Ni25Cr25Mo5Al5 high-entropy alloy
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Type
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Presentation
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Keywords
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Cost-effective high-entropy alloys; Cyclic closed-die forging; Grain refinement; Crystallographic orientation; Electrochemical behavior.
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Abstract
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This research has undoubtedly offered valuable insight into the correlation of grain refinement and crystallographic texture with the electrochemical properties of the cost-effective Fe40Ni25Cr25Mo5Al5 high-entropy alloy in a 0.5 M H2SO4 solution, successfully processed through the cyclic closed-die forging (CCDF) technique for up to six passes. The findings revealed that the high strains imposed during CCDF processing, along with the uniform distribution of extremely fine grains, significantly decreased the corrosion current density of the alloy from 1.05 to 0.75 µA/cm2. Moreover, the presence of high-intensity {011} orientations, such as the Brass {011}<211> and P {110}<221> components in the CCDF-processed alloy, provided ideal conditions for developing oxide passive films with superior protection properties compared to the as-homogenized alloy. Consequently, these findings open new avenues for the exploration of the crystallographic-orientation-dependent electrochemical properties in the corrosion performance of high-entropy alloys.
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Researchers
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Evgeny Trofimov (Not In First Six Researchers), Nataliya Shaburova (Not In First Six Researchers), Milena Efimova (Fifth Researcher), Dmitry Mikhailov (Fourth Researcher), Svetlana Pratskova (Third Researcher), Omid Imantalab (Second Researcher), Majid Naseri (First Researcher)
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