Dynamic mechanical performance of FeNiCoAl-based high-entropy alloy: Enhancement via microbands and martensitic transformation

Aomin Huang; Cheng Zhang; Zezhou Li; Haoren Wang; Mingjie Xu; Chaoyi Zhu; Xin Wang; Marc A. Meyers; Enrique J. Lavernia

doi:10.1016/j.mtadv.2023.100439

Dynamic mechanical performance of FeNiCoAl-based high-entropy alloy: Enhancement via microbands and martensitic transformation

Aomin Huang, Cheng Zhang^*, Zezhou Li, Haoren Wang, Mingjie Xu, Chaoyi Zhu, Xin Wang, Marc A. Meyers, Enrique J. Lavernia^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

The non-equiatomic FeNiCoAlTaB high-entropy alloy exhibits outstanding quasi-static mechanical properties. Here, we investigate the microstructural evolution and mechanical response of this alloy subjected to dynamic loading, which has not been done before. A novel strategy combining extensive microbanding and martensitic transformation improves the resistance to the plastic instability by deterring the formation of adiabatic shear bands, that only occur beyond a critical shear strain larger than 4. The aged alloy, with grain sizes up to 400 μm, exhibits a dynamic yield stress over 1300 MPa with good deformability in this regime. This investigation sheds light on potential strategies for the enhancement of dynamic mechanical properties of structural materials through the use of a stress-induced martensitic transformation.

Original language	English
Article number	100439
Journal	Materials Today Advances
Volume	20
DOIs	https://doi.org/10.1016/j.mtadv.2023.100439
Publication status	Published - Dec 2023
Externally published	Yes

Keywords

Deformation-induced microband
Dynamic deformation
High-entropy alloy
Martensitic transformation

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10.1016/j.mtadv.2023.100439

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title = "Dynamic mechanical performance of FeNiCoAl-based high-entropy alloy: Enhancement via microbands and martensitic transformation",

abstract = "The non-equiatomic FeNiCoAlTaB high-entropy alloy exhibits outstanding quasi-static mechanical properties. Here, we investigate the microstructural evolution and mechanical response of this alloy subjected to dynamic loading, which has not been done before. A novel strategy combining extensive microbanding and martensitic transformation improves the resistance to the plastic instability by deterring the formation of adiabatic shear bands, that only occur beyond a critical shear strain larger than 4. The aged alloy, with grain sizes up to 400 μm, exhibits a dynamic yield stress over 1300 MPa with good deformability in this regime. This investigation sheds light on potential strategies for the enhancement of dynamic mechanical properties of structural materials through the use of a stress-induced martensitic transformation.",

keywords = "Deformation-induced microband, Dynamic deformation, High-entropy alloy, Martensitic transformation",

author = "Aomin Huang and Cheng Zhang and Zezhou Li and Haoren Wang and Mingjie Xu and Chaoyi Zhu and Xin Wang and Meyers, {Marc A.} and Lavernia, {Enrique J.}",

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year = "2023",

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doi = "10.1016/j.mtadv.2023.100439",

language = "English",

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journal = "Materials Today Advances",

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T1 - Dynamic mechanical performance of FeNiCoAl-based high-entropy alloy

T2 - Enhancement via microbands and martensitic transformation

AU - Huang, Aomin

AU - Zhang, Cheng

AU - Li, Zezhou

AU - Wang, Haoren

AU - Xu, Mingjie

AU - Zhu, Chaoyi

AU - Wang, Xin

AU - Meyers, Marc A.

AU - Lavernia, Enrique J.

PY - 2023/12

Y1 - 2023/12

N2 - The non-equiatomic FeNiCoAlTaB high-entropy alloy exhibits outstanding quasi-static mechanical properties. Here, we investigate the microstructural evolution and mechanical response of this alloy subjected to dynamic loading, which has not been done before. A novel strategy combining extensive microbanding and martensitic transformation improves the resistance to the plastic instability by deterring the formation of adiabatic shear bands, that only occur beyond a critical shear strain larger than 4. The aged alloy, with grain sizes up to 400 μm, exhibits a dynamic yield stress over 1300 MPa with good deformability in this regime. This investigation sheds light on potential strategies for the enhancement of dynamic mechanical properties of structural materials through the use of a stress-induced martensitic transformation.

AB - The non-equiatomic FeNiCoAlTaB high-entropy alloy exhibits outstanding quasi-static mechanical properties. Here, we investigate the microstructural evolution and mechanical response of this alloy subjected to dynamic loading, which has not been done before. A novel strategy combining extensive microbanding and martensitic transformation improves the resistance to the plastic instability by deterring the formation of adiabatic shear bands, that only occur beyond a critical shear strain larger than 4. The aged alloy, with grain sizes up to 400 μm, exhibits a dynamic yield stress over 1300 MPa with good deformability in this regime. This investigation sheds light on potential strategies for the enhancement of dynamic mechanical properties of structural materials through the use of a stress-induced martensitic transformation.

KW - Deformation-induced microband

KW - Dynamic deformation

KW - High-entropy alloy

KW - Martensitic transformation

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JO - Materials Today Advances

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Dynamic mechanical performance of FeNiCoAl-based high-entropy alloy: Enhancement via microbands and martensitic transformation

Abstract

Keywords

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