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

Abstract:

:The mechanical behavior of a single phase (fcc) Al0.3CoCrFeNi 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.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Li Z,Zhao S,Diao H,Liaw PK,Meyers MA

doi

10.1038/srep42742

subject

Has Abstract

pub_date

2017-02-17 00:00:00

pages

42742

issn

2045-2322

pii

srep42742

journal_volume

7

pub_type

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