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Hetero-deformation and fracture of a near-eutectic high entropy alloy under dynamic impact

delete2025-04-01
delete0
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OA
AI
S
S.S. Dash
L
Lang, L.
J
Joseph Agyapong
S
Shengrong Yang
X
Xiao Shang
M
Ming Li
W
Wandong Wang
M
M. Gorban
T
Tobin Filleter
D
D.L. Chen
S
Solomon Boakye–Yiadom
Y
Yu Zou *
DOI：10.1016/j.scriptamat.2025.116593delete
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Abstract

Abstract

En 中文
Eutectic high entropy alloys (EHEAs) typically consist of two phases with distinct structures and properties, for example, soft and hard phases that deform heterogeneously. In this study, we report the deformation and failure phenomena in a near-EHEA (AlCoFeNi2) with face-centered cubic (FCC) and ordered body-centered cubic (B2) phases under high strain rate impacts (up to similar to 7 x 10(3) s(-1)). We find that such EHEA undergoes localized softening via the shear rupture of the brittle B2 phase, leading to high plastic strains at failures. Moreover, a majority of cracks initiate along cumulative wavy-slip traces within the B2 grains due to strain localizations. This study improves the understanding of the deformation and fracture mechanisms of EHEAs under dynamic impact conditions.
Keywords:
High entropy alloys
Dual-phase microstructure
Dynamic deformation
Plasticity
Failure
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Journal

Scripta Materialia cover
Scripta Materialia
IF:
5.6
Papers:
1.6W
Citations:
5.1W

Organization

Y
york university - canada
Scholars:
8.1K
Papers: 8.9K
Citations: 10
M
McMaster University
Scholars:
3.6W
Papers: 3.3W
Citations: 4.4W
U
university of toronto
Scholars:
14.5W
Papers: 11.9W
Citations: 165
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