Shock-compression microstructure transformation of the additive manufactured FeCoNiAlTi high-entropy alloy

Yongkun Mu; Zhibin Wu; Yan Ma; Yuefei Jia; Dongye Yang; Pa Ma; Wenjun Zhao; Da Li; Yandong Jia; Gang Wang; Tienchong Chang

doi:10.1016/j.vacuum.2023.112555

Shock-compression microstructure transformation of the additive manufactured FeCoNiAlTi high-entropy alloy

Yongkun Mu, Zhibin Wu, Yan Ma, Yuefei Jia, Dongye Yang, Pa Ma, Wenjun Zhao, Da Li, Yandong Jia^*, Gang Wang^*, Tienchong Chang

^*Corresponding author for this work

Department of Materials Science and Engineering

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

8 Citations (Scopus)

Abstract

Investigation into the microstructural deformation mechanisms of a high-entropy alloy (Fe_28.0Co_29.5Ni_27.5Al_8.5Ti_6.5 (at%)) prepared by laser additive manufacturing and aging treatment, with a three-phase nanocomposite structure, is carried out via shock compression experiments using plate impact. Microstructural characteristics and compositions are inspected using X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The microstructure of the high-entropy alloy is comprised of high-density dislocation structures, high-volume-fraction L1₂ nano-precipitates, a small amount of L2₁ nano-precipitates, and face-centered cubic (FCC) matrix phases. The lattice arrangement of the FCC matrix phase is disordered, with strong segregation of Fe and Co atoms, while Ni, Al, and Ti atoms are predominantly present in the ordered L1₂ and L2₁ nano-precipitates. The FCC matrix or the FCC matrix with high-density stacking faults are bounded by a 9R-phase between two phase boundaries. The mechanisms of microstructural transformation of the high entropy alloy are discussed in detail. © 2023 Elsevier Ltd.

Original language	English
Article number	112555
Journal	Vacuum
Volume	217
Online published	28 Aug 2023
DOIs	https://doi.org/10.1016/j.vacuum.2023.112555
Publication status	Published - Nov 2023

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SDG 9 Industry, Innovation, and Infrastructure

Research Keywords

High-entropy alloy
Additive manufacturing
Shock-compression
9R-phase

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title = "Shock-compression microstructure transformation of the additive manufactured FeCoNiAlTi high-entropy alloy",

abstract = "Investigation into the microstructural deformation mechanisms of a high-entropy alloy (Fe28.0Co29.5Ni27.5Al8.5Ti6.5 (at%)) prepared by laser additive manufacturing and aging treatment, with a three-phase nanocomposite structure, is carried out via shock compression experiments using plate impact. Microstructural characteristics and compositions are inspected using X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The microstructure of the high-entropy alloy is comprised of high-density dislocation structures, high-volume-fraction L12 nano-precipitates, a small amount of L21 nano-precipitates, and face-centered cubic (FCC) matrix phases. The lattice arrangement of the FCC matrix phase is disordered, with strong segregation of Fe and Co atoms, while Ni, Al, and Ti atoms are predominantly present in the ordered L12 and L21 nano-precipitates. The FCC matrix or the FCC matrix with high-density stacking faults are bounded by a 9R-phase between two phase boundaries. The mechanisms of microstructural transformation of the high entropy alloy are discussed in detail. {\textcopyright} 2023 Elsevier Ltd.",

keywords = "High-entropy alloy, Additive manufacturing, Shock-compression, 9R-phase",

author = "Yongkun Mu and Zhibin Wu and Yan Ma and Yuefei Jia and Dongye Yang and Pa Ma and Wenjun Zhao and Da Li and Yandong Jia and Gang Wang and Tienchong Chang",

year = "2023",

month = nov,

doi = "10.1016/j.vacuum.2023.112555",

language = "English",

volume = "217",

journal = "Vacuum",

issn = "0042-207X",

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TY - JOUR

T1 - Shock-compression microstructure transformation of the additive manufactured FeCoNiAlTi high-entropy alloy

AU - Mu, Yongkun

AU - Wu, Zhibin

AU - Ma, Yan

AU - Jia, Yuefei

AU - Yang, Dongye

AU - Ma, Pa

AU - Zhao, Wenjun

AU - Li, Da

AU - Jia, Yandong

AU - Wang, Gang

AU - Chang, Tienchong

PY - 2023/11

Y1 - 2023/11

N2 - Investigation into the microstructural deformation mechanisms of a high-entropy alloy (Fe28.0Co29.5Ni27.5Al8.5Ti6.5 (at%)) prepared by laser additive manufacturing and aging treatment, with a three-phase nanocomposite structure, is carried out via shock compression experiments using plate impact. Microstructural characteristics and compositions are inspected using X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The microstructure of the high-entropy alloy is comprised of high-density dislocation structures, high-volume-fraction L12 nano-precipitates, a small amount of L21 nano-precipitates, and face-centered cubic (FCC) matrix phases. The lattice arrangement of the FCC matrix phase is disordered, with strong segregation of Fe and Co atoms, while Ni, Al, and Ti atoms are predominantly present in the ordered L12 and L21 nano-precipitates. The FCC matrix or the FCC matrix with high-density stacking faults are bounded by a 9R-phase between two phase boundaries. The mechanisms of microstructural transformation of the high entropy alloy are discussed in detail. © 2023 Elsevier Ltd.

AB - Investigation into the microstructural deformation mechanisms of a high-entropy alloy (Fe28.0Co29.5Ni27.5Al8.5Ti6.5 (at%)) prepared by laser additive manufacturing and aging treatment, with a three-phase nanocomposite structure, is carried out via shock compression experiments using plate impact. Microstructural characteristics and compositions are inspected using X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The microstructure of the high-entropy alloy is comprised of high-density dislocation structures, high-volume-fraction L12 nano-precipitates, a small amount of L21 nano-precipitates, and face-centered cubic (FCC) matrix phases. The lattice arrangement of the FCC matrix phase is disordered, with strong segregation of Fe and Co atoms, while Ni, Al, and Ti atoms are predominantly present in the ordered L12 and L21 nano-precipitates. The FCC matrix or the FCC matrix with high-density stacking faults are bounded by a 9R-phase between two phase boundaries. The mechanisms of microstructural transformation of the high entropy alloy are discussed in detail. © 2023 Elsevier Ltd.

KW - High-entropy alloy

KW - Additive manufacturing

KW - Shock-compression

KW - 9R-phase

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U2 - 10.1016/j.vacuum.2023.112555

DO - 10.1016/j.vacuum.2023.112555

M3 - RGC 21 - Publication in refereed journal

SN - 0042-207X

VL - 217

JO - Vacuum

JF - Vacuum

M1 - 112555

ER -

Shock-compression microstructure transformation of the additive manufactured FeCoNiAlTi high-entropy alloy

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