Adiabatic shear localization in the CrMnFeCoNi high-entropy alloy

By Zezhou Li, Shiteng Zhao, Senhat Al-Otaibi, Y. Liu, Bingfeng Wang, M. Meyers. Acta Materialia, 2018

234 citations recorded by the source corpus.

Abstract The mechanical behavior of the single phase (fcc) CrMnFeCoNi high-entropy alloy (HEA) is examined in the dynamic regime. A series of experiments by dynamic-loading hat-shaped specimens using stopper rings to control the displacement are performed, and the alloy resists adiabatic shear-band formation up to a very large imposed shear strain of ∼7. It is proposed that the combination of the excellent strain-hardening ability and moderate thermal-softening effect retard shear localization. Recrystallized ultrafine-grained grains (diameters of 100–300 nm) with twins are revealed inside the shear band. Their formation is explained by the rotational dynamic recrystallization mechanism. The stability of the structure at high strain rates strongly suggests a high ballistic resistance for this class of alloys.

Subfields: Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/3bd8b7049c451d99693b860a61539376165d9d58

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Mechanical Engineering

1. Shiteng Zhao
2. M. Meyers
3. Zezhou Li
4. Hyoung-Seop Kim
5. Jae Wung Bae
6. R. Ritchie
7. J. Moon

Citations in the corpus

• Mechanical properties of high-entropy alloys with emphasis on face-centered cubic alloys (2019, methodology): “The SFEs of equiatomic fccmetals from pure Ni to CrMnFeCoNi HEA were established based on both XRD experiments and density functional theory (DFT) simulations by Zaddach et al. [118].”
• Superior tensile properties of 1%C-CoCrFeMnNi high-entropy alloy additively manufactured by selective laser melting (2020, background): “excellent fracture toughness [3], cryogenic properties [4], and high ballistic resistance [5]).”