Abstract
Dynamic loading of the Fe50Mn30Co10Cr10 high-entropy alloy (HEA) was carried out using a split Hopkinson pressure bar at room temperature. The effects of microstructures and loading strain rates on the adiabatic shear susceptibility of an Fe50Mn30Co10Cr10 HEA were evaluated for the first time by comparing metallographic observation, the stress collapse time, the critical values of strain corresponding to the adiabatic shearing initiation, and the adiabatic shearing formation energy per unit volume. The results show that the adiabatic shear susceptibility increases with the increase of loading strain rate. The smaller the grain size and the more hexagonal close-packed (hcp) phase of the Fe50Mn30Co10Cr10 HEA, the greater the strain hardening effect and the stronger the localized deformation resistance under the same dynamic loading conditions, and the lower the adiabatic shear susceptibility.
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Acknowledgments
This work is supported by the National Natural Science Foundation of China (Nos. 51871243, 51574290) and Hunan Provincial Natural Science Foundation of China (No. 2019JJ40381).
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Manuscript submitted July 9, 2019.
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Yang, S., Yang, Y., Yang, Z. et al. Adiabatic Shear Susceptibility of Fe50Mn30Co10Cr10 High-Entropy Alloy. Metall Mater Trans A 51, 1771–1780 (2020). https://doi.org/10.1007/s11661-020-05641-3
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DOI: https://doi.org/10.1007/s11661-020-05641-3