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Single Phase Medium Entropy U-Based Alloys: Thermodynamics, Synthesis, and Mechanical Behavior
Michael Aizenshtein,Eli Brosh,Shai Silhov,Shlomo Levi,Ziv Ungarish,Eyal Grinberg,Shmuel Hayun 대한금속·재료학회 2023 METALS AND MATERIALS International Vol.29 No.12
High and medium entropy alloys (HEAs and MEAs) exhibit superior resistance to irradiation damage: there is thus greatincentive to study uranium-based HEAs and MEAs. These materials could potentially be suitable candidates for use asnuclear fuels where severe irradiation regimes prevail. In the present study, the ability to predict single phase regions in thequaternary system, Mo–Nb–U–Zr, using thermodynamic calculations was demonstrated and proven experimentally. Similarlyto other known bcc HEAs systems, the bcc phase in the present MEA system was shown to exhibit high yield strengthbut also brittleness. It was also shown that a single phase in the MEA system, Mo–Nb–U–Zr, could be obtained only forcompositions containing no more than 10 at% of Mo.