Research and Application of Materials Science

Structure evolution in undercooled CoCrNi medium entropy alloys by glass fluxing method

YUSubo (State Key Laboratory of Metastable Materials Science and Technology, Yanshan University), SHERSTNEVAleksandr (State Key Laboratory of Metastable Materials Science and Technology, Yanshan University), MARKOVSKIIMikhail (State Key Laboratory of Metastable Materials Science and Technology, Yanshan University), KATAITSEVADaria (State Key Laboratory of Metastable Materials Science and Technology, Yanshan University), LIGong (State Key Laboratory of Metastable Materials Science and Technology, Yanshan University)

Abstract


Undercooling of ternary CoCrNi medium entropy alloy (MEA) was achieved by molten glass fluxing method. The influence of undercooling on microstructure and mechanical properties of was investigated. The microstructure changes during the undercooling process identified by transmission electron microscope and scanning electron microscope shows that the grain size and intergranular phase all change after the undercooling treatment. The yield strength of the ternary MEA increased significantly after undercooling treatment, which attribute to the refined grain size and the formation of the new phase. Undercooling method can be used as a potential method to modify the microstructure and improve the mechanical properties of MEAs.

Keywords


Medium-entropy alloy; undercooling; microstructure; mechanical properties

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DOI: https://doi.org/10.33142/rams.v4i2.8464

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Copyright (c) 2022 Subo YU, Aleksandr SHERSTNEV, Mikhail MARKOVSKII, Daria KATAITSEVA, Gong LI

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