Low-temperature mechanical properties and thermally activated plasticity parameters of the CrMnFeCoNi2Cu high entropy alloy

The mechanical properties of a high-entropy CrMnFeCoNi2Cu alloy with an FCC lattice have been studied in a broad temperature range (4.2–350 K). The microhardness and Young’s modulus were measured at 300 K for two structural states. The temperature dependences of the yield strength, deforming stress,...

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Bibliographic Details
Published in:Low temperature physics (Woodbury, N.Y.) N.Y.), 2020-09, Vol.46 (9), p.958-968
Main Authors: Tabachnikova, E. D., Shapovalov, Yu. O., Smirnov, S. N., Gorban’, V. F., Krapivka, N. A., Firstov, S. A.
Format: Article
Language:English
Subjects:
Deformation effects
Face centered cubic lattice
High entropy alloys
Low temperature
Mechanical properties
Microhardness
Modulus of elasticity
Parameter estimation
Plastic properties
Strain rate sensitivity
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Summary:The mechanical properties of a high-entropy CrMnFeCoNi2Cu alloy with an FCC lattice have been studied in a broad temperature range (4.2–350 K). The microhardness and Young’s modulus were measured at 300 K for two structural states. The temperature dependences of the yield strength, deforming stress, and strain rate sensitivity have been obtained. It was found that a high-strength state is realized in the alloy while maintaining high plasticity, over the entire temperature range. Empirical estimates of microscopic plasticity parameters and internal and effective stresses have been obtained using the thermally activated deformation model.
ISSN:1063-777X
1090-6517
DOI:10.1063/10.0001720