High-velocity deformation of Al0.3 CoCrFeNi high-entropy alloy: Remarkable resistance to shear failure

Z. Li, S. Zhao, H. Diao, P. K. Liaw, M. A. Meyers*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

187 Citations (Scopus)

Abstract

The mechanical behavior of a single phase (fcc) Al0.3 CoCrFeNi high-entropy alloy (HEA) was studied in the low and high strain-rate regimes. The combination of multiple strengthening mechanisms such as solid solution hardening, forest dislocation hardening, as well as mechanical twinning leads to a high work hardening rate, which is significantly larger than that for Al and is retained in the dynamic regime. The resistance to shear localization was studied by dynamically-loading hat-shaped specimens to induce forced shear localization. However, no adiabatic shear band could be observed. It is therefore proposed that the excellent strain hardening ability gives rise to remarkable resistance to shear localization, which makes this material an excellent candidate for penetration protection applications such as armors.

Original languageEnglish
Article number42742
JournalScientific Reports
Volume7
DOIs
Publication statusPublished - 17 Feb 2017
Externally publishedYes

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