Elemental phase partitioning in the γ - γ" Ni2CoFeCrNb0.15 high entropy alloy

Bin Han; Jie Wei; Feng He; Chen Da Chen; Zhi Jun Wang; Alice Hu; Wenzhong Zhou; Ji Jung Kai

doi:10.3390/e20120910

Elemental phase partitioning in the γ - γ" Ni₂CoFeCrNb_0.15 high entropy alloy

Bin Han, Jie Wei, Feng He, Chen Da Chen, Zhi Jun Wang, Alice Hu, Wenzhong Zhou, Ji Jung Kai

School of Materials Sience and Engineering

City University of Hong Kong

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

11 Scopus citations

Abstract

The partitioning of the alloying elements into the γ" nanoparticles in a Ni₂CoFeCrNb_0.15 high entropy alloy was studied by the combination of atom probe tomography and first-principles calculations. The atom probe tomography results show that the Co, Fe, and Cr atoms incorporated into the Ni₃Nb-type γ" nanoparticles but their partitioning behaviors are significantly different. The Co element is much easier to partition into the γ" nanoparticles than Fe and Cr elements. The first-principles calculations demonstrated that the different partitioning behaviors of Co, Fe and Cr elements into the γ" nanoparticles resulted from the differences of their specific chemical potentials and bonding states in the γ" phase.

Original language	English
Article number	910
Journal	Entropy
Volume	20
Issue number	12
DOIs	https://doi.org/10.3390/e20120910
State	Published - 1 Dec 2018

Keywords

Atom probe tomography
Elemental partitioning
First-principles calculations
Gamma double prime nanoparticles
High entropy alloy

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10.3390/e20120910

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title = "Elemental phase partitioning in the γ - γ{"} Ni2CoFeCrNb0.15 high entropy alloy",

abstract = "The partitioning of the alloying elements into the γ{"} nanoparticles in a Ni2CoFeCrNb0.15 high entropy alloy was studied by the combination of atom probe tomography and first-principles calculations. The atom probe tomography results show that the Co, Fe, and Cr atoms incorporated into the Ni3Nb-type γ{"} nanoparticles but their partitioning behaviors are significantly different. The Co element is much easier to partition into the γ{"} nanoparticles than Fe and Cr elements. The first-principles calculations demonstrated that the different partitioning behaviors of Co, Fe and Cr elements into the γ{"} nanoparticles resulted from the differences of their specific chemical potentials and bonding states in the γ{"} phase.",

keywords = "Atom probe tomography, Elemental partitioning, First-principles calculations, Gamma double prime nanoparticles, High entropy alloy",

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T1 - Elemental phase partitioning in the γ - γ" Ni2CoFeCrNb0.15 high entropy alloy

AU - Han, Bin

AU - Wei, Jie

AU - He, Feng

AU - Da Chen, Chen

AU - Wang, Zhi Jun

AU - Hu, Alice

AU - Zhou, Wenzhong

AU - Kai, Ji Jung

PY - 2018/12/1

Y1 - 2018/12/1

N2 - The partitioning of the alloying elements into the γ" nanoparticles in a Ni2CoFeCrNb0.15 high entropy alloy was studied by the combination of atom probe tomography and first-principles calculations. The atom probe tomography results show that the Co, Fe, and Cr atoms incorporated into the Ni3Nb-type γ" nanoparticles but their partitioning behaviors are significantly different. The Co element is much easier to partition into the γ" nanoparticles than Fe and Cr elements. The first-principles calculations demonstrated that the different partitioning behaviors of Co, Fe and Cr elements into the γ" nanoparticles resulted from the differences of their specific chemical potentials and bonding states in the γ" phase.

AB - The partitioning of the alloying elements into the γ" nanoparticles in a Ni2CoFeCrNb0.15 high entropy alloy was studied by the combination of atom probe tomography and first-principles calculations. The atom probe tomography results show that the Co, Fe, and Cr atoms incorporated into the Ni3Nb-type γ" nanoparticles but their partitioning behaviors are significantly different. The Co element is much easier to partition into the γ" nanoparticles than Fe and Cr elements. The first-principles calculations demonstrated that the different partitioning behaviors of Co, Fe and Cr elements into the γ" nanoparticles resulted from the differences of their specific chemical potentials and bonding states in the γ" phase.

KW - Atom probe tomography

KW - Elemental partitioning

KW - First-principles calculations

KW - Gamma double prime nanoparticles

KW - High entropy alloy

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U2 - 10.3390/e20120910

DO - 10.3390/e20120910

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Elemental phase partitioning in the γ - γ" Ni₂CoFeCrNb_0.15 high entropy alloy

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Keywords

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