# Characteristic deformation microstructure evolution and deformation mechanisms in face-centered cubic high/medium entropy alloys

https://mdr.nims.go.jp/datasets/267cbbf4-e915-4f07-aba7-e24a281ac612

## File

- [Final version.pdf](https://mdr.nims.go.jp/filesets/61598edd-c348-4c4b-a680-46202b67cfff/download) ([Detail](https://mdr.nims.go.jp/filesets/61598edd-c348-4c4b-a680-46202b67cfff.md))

## Id

267cbbf4-e915-4f07-aba7-e24a281ac612

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-11-21T06:21:02.642242Z

## Updated at

2025-12-11T03:30:12.642775Z

## Published at

2025-12-11T03:24:32.369735Z

## Doi

https://doi.org/10.48505/nims.5992

## First published url

https://doi.org/10.1016/j.actamat.2024.120498

## Date published

2024-10-21

## Recorded date published

2025-1

## Resource type

journal_article

## Manuscript type

authors_original

## Collection



## Title

- title: Characteristic deformation microstructure evolution and deformation mechanisms
    in face-centered cubic high/medium entropy alloys
  title_type: original
  lang: en

## Description

- description: 'Face-centered cubic (FCC) high/medium entropy alloys (HEAs/MEAs),
    novel multi-principal element alloys, are known to exhibit exceptional mechanical
    properties at room temperature; however, the origin is still elusive. Here, we
    report the deformation microstructure evolutions in a tensile-deformed Co20Cr40Ni40
    representative MEA and Co60Ni40 alloy, a conventional binary alloy for comparison.
    These FCC alloys have high/low friction stresses, fundamental resistance to dislocation
    glide in solid solutions, respectively, and share similar other material properties,
    including stacking fault energy. The Co20Cr40Ni40 MEA exhibited higher yield strength
    and workhardening ability than in the Co60Ni40 alloy. Deformation microstructures
    in the Co60Ni40 alloy were marked by the presence of coarse dislocation cells
    (DCs) regardless of grain orientation and a few deformation twins (DTs) in grains
    with the tensile axis (TA) near <1 1 1>. In contrast, the MEA developed three
    distinct deformation microstructures depending on grain orientations: fine DCs
    in grains with the TA near <1 0 0>, planar dislocation structure (PDS) in grains
    with other orientations, and a high density of DTs along with PDS in grains oriented
    <1 1 1>. Three-dimensional electron tomography revealed that PDS in the MEA confined
    dislocations within specific {1 1 1} planes, indicating suppression of cross-slip
    of screw dislocations and dynamic recovery. In-situ X-ray diffraction during tensile
    deformation showed a higher dislocation density in the MEA than in the Co60Ni40
    alloy. These findings demonstrate that FCC HEAs/MEAs with high friction stresses
    naturally develop unique deformation microstructures which is beneficial for realizing
    superior mechanical properties compared to conventional materials.'
  description_type: abstract
  lang: und

## Creator

- name: Shuhei Yoshida
  role: author
- name: Rui Fu
  role: author
- name: Wu Gong
  role: author
- name: Takuto Ikeuchi
  role: author
- name: Yu Bai
  role: author
- name: Zongqiang Feng
  role: author
- name: Guilin Wu
  role: author
- name: Akinobu Shibata
  role: author
  orcid: https://orcid.org/0000-0001-8577-6411
  organization: National Institute for Materials Science
- name: Niels Hansen
  role: author
- name: Xiaoxu Huang
  role: author
- name: Nobuhiro Tsuji
  role: author

## Contact agent



## Publisher

organization: Elsevier BV

## Managing organization



## Keyword

- subject: High/medium entropy alloys
  schema: not_defined
- subject: Dislocation structure
  schema: not_defined
- subject: Deformation twinning
  schema: not_defined
- subject: Strain hardening
  schema: not_defined
- subject: 3D characterization
  schema: not_defined

## Rights

- identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Acta Materialia
  issn: '13596454'
  volume: '283'
  article_number: '120498'

## Conference



## Related item



## Funding

- funder_name: Government of Japan Ministry of Education Culture Sports Science and
    Technology
- funder_name: National Natural Science Foundation of China
- funder_name: Japan Society for the Promotion of Science

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## Measurement method



## Specimen



## Chemical composition



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## Fileset

- id: 61598edd-c348-4c4b-a680-46202b67cfff
  filename: Final version.pdf
  content_type: application/pdf
  size: 5487970
  md5: f555474d4797ce9882d54a766e4882b4

## Thumbnail

fileset_id: 61598edd-c348-4c4b-a680-46202b67cfff
filename: Final version.pdf