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Grain boundary character distribution of CoCrFeMnNi high-entropy alloy.

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Title: Grain boundary character distribution of CoCrFeMnNi high-entropy alloy.
Authors: Chirayutthanasak, Ooraphan1 (AUTHOR), Sarochawikasit, Rajchawit1 (AUTHOR), Promoppatum, Patcharapit2 (AUTHOR), Ouyang, Fan-Yi3 (AUTHOR), Panwisawas, Chinnapat4 (AUTHOR), Han, Junhee5 (AUTHOR), Thirathipviwat, Pramote1,6 (AUTHOR) pramote-thirathipviwat-js@ynu.ac.jp, Ratanaphan, Sutatch1,7 (AUTHOR) sutatch.ratanaphan@mail.kmutt.ac.th
Source: Scripta Materialia. Sep2026, Vol. 282, pN.PAG-N.PAG. 1p.
Subjects: Crystal grain boundaries, High-entropy alloys, Electron backscattering, Entropy, Face centered cubic structure
Abstract: The grain boundary character distribution of an equiatomic CoCrFeMnNi high-entropy alloy (HEA) was statistically determined using electron backscatter diffraction. The face-centered cubic (fcc) HEA exhibits an exceptionally high fraction of the Σ3 coherent twin boundary, constituting 94% of the total Σ3 grain boundary (GB) population, which is nearly double the levels observed in Cu (51%) and Ni (61%). This reflects an increased thermodynamic preference for the lowest-energy state, driven by suppressed GB energy anisotropy and a deeper relative energy minimum at the coherent twin configuration compared to fcc elemental metals (Au, Cu, and Ni). Beyond Σ3 misorientation, high-entropy effects from configurational entropy and local lattice distortion further stabilize {111} symmetrical twist configurations, leading to significant population enrichment across multiple misorientations, including Σ7, Σ13b, and Σ21a. Ultimately, these findings reinforce the high-entropy grain boundaries (HEGBs) framework, providing a foundation for next-generation multifunctional high-entropy materials. [Display omitted] [ABSTRACT FROM AUTHOR]
Copyright of Scripta Materialia is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 194396059
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Grain boundary character distribution of CoCrFeMnNi high-entropy alloy.
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  Data: <searchLink fieldCode="JN" term="%22Scripta+Materialia%22">Scripta Materialia</searchLink>. Sep2026, Vol. 282, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Crystal+grain+boundaries%22">Crystal grain boundaries</searchLink><br /><searchLink fieldCode="DE" term="%22High-entropy+alloys%22">High-entropy alloys</searchLink><br /><searchLink fieldCode="DE" term="%22Electron+backscattering%22">Electron backscattering</searchLink><br /><searchLink fieldCode="DE" term="%22Entropy%22">Entropy</searchLink><br /><searchLink fieldCode="DE" term="%22Face+centered+cubic+structure%22">Face centered cubic structure</searchLink>
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  Label: Abstract
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  Data: The grain boundary character distribution of an equiatomic CoCrFeMnNi high-entropy alloy (HEA) was statistically determined using electron backscatter diffraction. The face-centered cubic (fcc) HEA exhibits an exceptionally high fraction of the Σ3 coherent twin boundary, constituting 94% of the total Σ3 grain boundary (GB) population, which is nearly double the levels observed in Cu (51%) and Ni (61%). This reflects an increased thermodynamic preference for the lowest-energy state, driven by suppressed GB energy anisotropy and a deeper relative energy minimum at the coherent twin configuration compared to fcc elemental metals (Au, Cu, and Ni). Beyond Σ3 misorientation, high-entropy effects from configurational entropy and local lattice distortion further stabilize {111} symmetrical twist configurations, leading to significant population enrichment across multiple misorientations, including Σ7, Σ13b, and Σ21a. Ultimately, these findings reinforce the high-entropy grain boundaries (HEGBs) framework, providing a foundation for next-generation multifunctional high-entropy materials. [Display omitted] [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Scripta Materialia is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1016/j.scriptamat.2026.117401
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      – Code: eng
        Text: English
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        PageCount: 1
        StartPage: N.PAG
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      – SubjectFull: Crystal grain boundaries
        Type: general
      – SubjectFull: High-entropy alloys
        Type: general
      – SubjectFull: Electron backscattering
        Type: general
      – SubjectFull: Entropy
        Type: general
      – SubjectFull: Face centered cubic structure
        Type: general
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      – TitleFull: Grain boundary character distribution of CoCrFeMnNi high-entropy alloy.
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            NameFull: Chirayutthanasak, Ooraphan
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            NameFull: Ouyang, Fan-Yi
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            NameFull: Panwisawas, Chinnapat
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            – D: 01
              M: 09
              Text: Sep2026
              Type: published
              Y: 2026
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