Cited by 1,614High Entropy Alloys StudiesMicrostructure and mechanical propertiesMetallic Glasses and Amorphous Alloys

Tuning element distribution, structure and properties by composition in high-entropy alloys

Ding, Qingqing, Zhang, Yin, Chen, Xiao, Fu, Xiaoqian, Chen, Dengke, Chen, Sijing, Gu, Lin, Wei, Fei +8 more·2019·Nature

Abstract

High-entropy alloys are a class of materials that contain five or more elements in near-equiatomic proportions 1,2 . Their unconventional compositions and chemical structures hold promise for achieving unprecedented combinations of mechanical properties 3-8 . Rational design of such alloys hinges on an understanding of the composition-structure-property relationships in a near-infinite compositional space 9,10 . Here we use atomic-resolution chemical mapping to reveal the element distribution of the widely studied face-centred cubic CrMnFeCoNi Cantor alloy 2 and of a new face-centred cubic alloy, CrFeCoNiPd. In the Cantor alloy, the distribution of the five constituent elements is relatively random and uniform. By contrast, in the CrFeCoNiPd alloy, in which the palladium atoms have a markedly different atomic size and electronegativity from the other elements, the homogeneity decreases considerably; all five elements tend to show greater aggregation, with a wavelength of incipient concentration waves 11,12 as small as 1 to 3 nanometres. The resulting nanoscale alternating tensile and compressive strain fields lead to considerable resistance to dislocation glide. In situ transmission electron microscopy during straining experiments reveals massive dislocation cross-slip from the early stage of plastic deformation, resulting in strong dislocation interactions between multiple slip systems. These deformation mechanisms in the CrFeCoNiPd alloy, which differ markedly from those in…

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Crossref · 10.1038/s41586-019-1617-1

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Authors
Ding, Q., Zhang, Y., Chen, X., Fu, X., Chen, D., Chen, S., Gu, L., Wei, F., Bei, H., Gao, Y., Wen, M., Li, J., Zhang, Z., Zhu, T., Ritchie, R. O., & Yu, Q.
Affiliations
  • State Key Laboratory of Silicon Materials (CN)
  • Georgia Institute of Technology (US)
  • Tsinghua University (CN)
  • Chinese Academy of Sciences (CN)
  • Oak Ridge National Laboratory (US)
  • Lawrence Berkeley National Laboratory (US)
Corresponding author
  • Zhu, Ting
  • Ritchie, Robert O.
  • Yu, Qian
Venue
Nature
Published
2019-10-09
Volume
574
Issue
7777
Pages
223-227
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2979750733
Cited by
1,614
References
36
Citations by year
2026: 198 · 2025: 293 · 2024: 292 · 2023: 248 · 2022: 247 · 2021: 194 · 2020: 129 · 2019: 13
FWCI
82.05
Type
journal article
Language
en
Open access
closed
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
Topics
  • Physical Sciences › Engineering › Mechanical Engineering › High Entropy Alloys Studies
  • Physical Sciences › Materials Science › Materials Chemistry › Microstructure and mechanical properties
  • Physical Sciences › Engineering › Mechanical Engineering › Metallic Glasses and Amorphous Alloys
Keywords
high-entropy alloys, elemental distribution, face-centered cubic alloys, concentration waves, dislocation cross-slip, dislocation interactions, stacking fault energy, yield strength, strain hardening, ductility, composition-structure-property relationships, palladium substitution

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