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Enhanced strength–ductility synergy in ultrafine-grained eutectic high-entropy alloys by inheriting microstructural lamellae

Peijian Shi, Weili Ren

2019enmaterialsalloysmechanicshigh-entropystrength

Abstract

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Realizing improved strength–ductility synergy in eutectic alloys acting as in situ composite materials remains a challenge in conventional eutectic systems, which is why eutectic high-entropy alloys (EHEAs) may offer wider in situ composite possibilities. This study employs an AlCoCrFeNi 2.1 EHEA to engineer an ultrafine-grained duplex microstructure that inherits its composite lamellar nature through tailored thermo-mechanical processing. The resulting samples demonstrate hierarchically-structural heterogeneity due to phase decomposition, improving mechanical response during deformation via a two-hierarchical constraint effect and a self-generated microcrack-arresting mechanism. This work provides a pathway for strengthening eutectic alloys and expands the design toolbox for high-performance materials based on EHEAs.

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Cite This Work

@article{49d7dc34-a5d0-404e-a390-5b65ee29d8dc,
  title={Enhanced strength–ductility synergy in ultrafine-grained eutectic high-entropy alloys by inheriting microstructural lamellae},
  author={Peijian Shi and Weili Ren},
  year={2019},
  language={en}
}
TY  - JOUR
TI  - Enhanced strength–ductility synergy in ultrafine-grained eutectic high-entropy alloys by inheriting microstructural lamellae
AU  - Peijian Shi
AU  - Weili Ren
PY  - 2019
LA  - en
ER  -

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