A comparison study of local lattice distortion in Ni80Pd20 binary alloy and FeCoNiCrPd high-entropy alloy

Y. Tong; S. Zhao; K. Jin; H. Bei; J. Y.P. Ko; Y. Zhang; F. X. Zhang

doi:10.1016/j.scriptamat.2018.07.002

A comparison study of local lattice distortion in Ni₈₀Pd₂₀ binary alloy and FeCoNiCrPd high-entropy alloy

Y. Tong^*
, S. Zhao
, K. Jin
, H. Bei
, J. Y.P. Ko
, Y. Zhang
, F. X. Zhang

^*Corresponding author for this work

Oak Ridge National Laboratory
Cornell University
University of Tennessee, Knoxville

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

58 Citations (Scopus)

Abstract

The effect of alloying Pd on the local lattice distortion (LLD) in the Ni and FeCoNiCr host matrixes is quantified by integrating local structure characterization and theoretical calculations. The local structure measurements reveal that the mean LLD in the FeCoNiCrPd high-entropy alloy (HEA) is twice as high as the Ni₈₀Pd₂₀ binary alloy though the FeCoNiCr base alloy has a negligible mean LLD. Density functional theory calculations unveil that the unexpected high mean LLD in FeCoNiCrPd is related to the high fluctuation of LLD in the FeCoNiCr matrix. These observations suggest a synergetic effect of chemical complexity on HEAs’ mean LLD.

Original language	English
Pages (from-to)	14-18
Number of pages	5
Journal	Scripta Materialia
Volume	156
DOIs	https://doi.org/10.1016/j.scriptamat.2018.07.002
Publication status	Published - Nov 2018
Externally published	Yes

Keywords

Density functional theory
High-entropy alloys
Lattice distortion
X-ray diffraction

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10.1016/j.scriptamat.2018.07.002

Cite this

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title = "A comparison study of local lattice distortion in Ni80Pd20 binary alloy and FeCoNiCrPd high-entropy alloy",

abstract = "The effect of alloying Pd on the local lattice distortion (LLD) in the Ni and FeCoNiCr host matrixes is quantified by integrating local structure characterization and theoretical calculations. The local structure measurements reveal that the mean LLD in the FeCoNiCrPd high-entropy alloy (HEA) is twice as high as the Ni80Pd20 binary alloy though the FeCoNiCr base alloy has a negligible mean LLD. Density functional theory calculations unveil that the unexpected high mean LLD in FeCoNiCrPd is related to the high fluctuation of LLD in the FeCoNiCr matrix. These observations suggest a synergetic effect of chemical complexity on HEAs{\textquoteright} mean LLD.",

keywords = "Density functional theory, High-entropy alloys, Lattice distortion, X-ray diffraction",

author = "Y. Tong and S. Zhao and K. Jin and H. Bei and Ko, \{J. Y.P.\} and Y. Zhang and Zhang, \{F. X.\}",

note = "Publisher Copyright: {\textcopyright} 2018",

year = "2018",

month = nov,

doi = "10.1016/j.scriptamat.2018.07.002",

language = "English",

volume = "156",

pages = "14--18",

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TY - JOUR

T1 - A comparison study of local lattice distortion in Ni80Pd20 binary alloy and FeCoNiCrPd high-entropy alloy

AU - Tong, Y.

AU - Zhao, S.

AU - Jin, K.

AU - Bei, H.

AU - Ko, J. Y.P.

AU - Zhang, Y.

AU - Zhang, F. X.

PY - 2018/11

Y1 - 2018/11

N2 - The effect of alloying Pd on the local lattice distortion (LLD) in the Ni and FeCoNiCr host matrixes is quantified by integrating local structure characterization and theoretical calculations. The local structure measurements reveal that the mean LLD in the FeCoNiCrPd high-entropy alloy (HEA) is twice as high as the Ni80Pd20 binary alloy though the FeCoNiCr base alloy has a negligible mean LLD. Density functional theory calculations unveil that the unexpected high mean LLD in FeCoNiCrPd is related to the high fluctuation of LLD in the FeCoNiCr matrix. These observations suggest a synergetic effect of chemical complexity on HEAs’ mean LLD.

AB - The effect of alloying Pd on the local lattice distortion (LLD) in the Ni and FeCoNiCr host matrixes is quantified by integrating local structure characterization and theoretical calculations. The local structure measurements reveal that the mean LLD in the FeCoNiCrPd high-entropy alloy (HEA) is twice as high as the Ni80Pd20 binary alloy though the FeCoNiCr base alloy has a negligible mean LLD. Density functional theory calculations unveil that the unexpected high mean LLD in FeCoNiCrPd is related to the high fluctuation of LLD in the FeCoNiCr matrix. These observations suggest a synergetic effect of chemical complexity on HEAs’ mean LLD.

KW - Density functional theory

KW - High-entropy alloys

KW - Lattice distortion

KW - X-ray diffraction

UR - https://www.scopus.com/pages/publications/85049604830

U2 - 10.1016/j.scriptamat.2018.07.002

DO - 10.1016/j.scriptamat.2018.07.002

M3 - Article

AN - SCOPUS:85049604830

SN - 1359-6462

VL - 156

SP - 14

EP - 18

JO - Scripta Materialia

JF - Scripta Materialia

ER -

A comparison study of local lattice distortion in Ni₈₀Pd₂₀ binary alloy and FeCoNiCrPd high-entropy alloy

Abstract

Keywords

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