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On the Influence of High Pressures and Boron Nitride on the Processes of Structure Formation and Microhardness of a High-Entropy Equiatomic Composition AlNiCoFeCr Alloy
The Udmurt Federal Research Center of the Ural Branch of RAS, Izhevsk, Russia
- 1 The Udmurt Federal Research Center of the Ural Branch of RAS, Izhevsk, Russia
Journal of Materials Science and Chemical Engineering·Volume 11 (2023)·Pages 135–141·Published 29 August 2023·DOI10.4236/msce.2023.118009
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Abstract
The structure of equiatomic high-entropy AlNiCoFeCr alloy obtained by arc melting was investigated. The influence of high pressures (5, 8 and 11 GPa), quenching temperature (1650?C) and small additions of reinforcing agent-boron nitride (10% of the alloy volume) on the microstructure and microhardness of the alloy after quenching was studied. Depending on the conditions of thermobaric action, structures based on solid solution of the B2 type or mixed phases with structures of the Al, A2 or B2 types are formed in the AlNiCoFeCr alloy, which influences the alloy microhardness that varies in the range of 5 - 12.5 GPa.
KeywordsMeltPressureMicrostructureMicrohardnessPhase
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