# Ultra-grain-refinement of face-centered cubic high/medium-entropy alloys: Approaching the limit of grain refinement through severe plastic deformation and recrystallization

https://mdr.nims.go.jp/datasets/ecf1e52c-5c1e-44cd-8075-494e10cfdf1c

## File

- [2025_Mater&Design_(Yoshida_HEA).pdf](https://mdr.nims.go.jp/filesets/0a3fbcc4-1a13-477c-b683-27d46c4a0c5b/download) ([Detail](https://mdr.nims.go.jp/filesets/0a3fbcc4-1a13-477c-b683-27d46c4a0c5b.md))

## Id

ecf1e52c-5c1e-44cd-8075-494e10cfdf1c

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-12-05T09:37:02.617448Z

## Updated at

2025-12-08T23:30:08.158632Z

## Published at

2025-12-08T23:24:14.048204Z

## Doi



## First published url

https://doi.org/10.1016/j.matdes.2025.114622

## Date published

2025-08-22

## Recorded date published

2025-10

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: 'Ultra-grain-refinement of face-centered cubic high/medium-entropy alloys:
    Approaching the limit of grain refinement through severe plastic deformation and
    recrystallization'
  title_type: original
  lang: en

## Description

- description: Face-centered cubic (FCC) high- and medium-entropy alloys (HEAs/MEAs)
    develop fully recrystallized ultrafinegrained (FRex-UFG) microstructures after
    simple deformation and annealing processes. However, the mechanistic origins remain
    unclear. This study explains why FRex-UFG microstructures are readily formed in
    FCC HEAs/MEAs and clarifies their characteristics of microstructural evolution
    during deformation and recrystallization. CoCrFeMnNi HEA and CoCrNi MEA were subjected
    to high-pressure torsion (HPT) followed by short-term annealing. HPT-processed
    HEA and MEA showed finer nanocrystalline structures with higher dislocation densities
    than in conventional materials, indicating that dynamic recovery is more inhibited
    in HEAs/MEAs. Subsequent annealing produced FRex-UFG microstructures with grain
    sizes (with/without annealing twins) of 410/200 nm and 448/80 nm in the HEA and
    MEA, respectively, which are the smallest among single-phase materials reported
    to date. Grain-growth activation energies of the HEA and MEA were three times
    higher than that of pure Ni. Hybrid Monte‑Carlo/molecular‑dynamics simulations
    of grain boundary (GB) structures in model HEAs revealed that severe lattice distortion
    reduces GB free volume, intensifying solute drag and retarding GB migration. These
    results demonstrate that inhibited dynamic recovery and sluggish GB migration,
    both inherent to HEAs/MEAs, elevate the density of potential nuclei for recrystallization
    while suppressing microstructural coarsening, leading to the formation of FRex-UFG
    microstructures.
  description_type: abstract
  lang: und

## Creator

- name: Shuhei Yoshida
  role: author
- name: Nokeun Park
  role: author
- name: Kohei Shiotani
  role: author
- name: Yu Bai
  role: author
- name: Tomoaki Niiyama
  role: author
- name: Akinobu Shibata
  role: author
  orcid: https://orcid.org/0000-0001-8577-6411
  organization: National Institute for Materials Science
- name: Tomotsugu Shimokawa
  role: author
- name: Nobuhiro Tsuji
  role: author

## Contact agent



## Publisher

organization: Elsevier BV

## Managing organization



## Keyword

- subject: Recrystallization
  schema: not_defined
- subject: Grain boundary migration
  schema: not_defined
- subject: Severe plastic deformation
  schema: not_defined
- subject: Deformation structure
  schema: not_defined
- subject: High/Medium entropy alloys
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by/4.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Materials & Design
  issn: '02641275'
  volume: '258'
  start_page: 114622
  end_page: 114622
  article_number: '114622'

## Conference



## Related item



## Funding

- identifier: JPMXP0112101000
  funder_name: Government of Japan Ministry of Education Culture Sports Science and
    Technology
- funder_name: Ministry of Science, ICT and Future Planning
- identifier: JP15H05767
  funder_name: Japan Society for the Promotion of Science
- identifier: JP22K14501
  funder_name: Japan Society for the Promotion of Science
- identifier: JP18H05455
  funder_name: Japan Society for the Promotion of Science
- identifier: JP18H05453
  funder_name: Japan Society for the Promotion of Science
- identifier: JP23K20037
  funder_name: Japan Society for the Promotion of Science
- identifier: JP25K00050
  funder_name: Japan Society for the Promotion of Science
- identifier: JP21K20487
  funder_name: Japan Society for the Promotion of Science
- identifier: JP18J20766
  funder_name: Japan Society for the Promotion of Science
- funder_name: National Research Foundation of Korea
- identifier: 2019B1801
  funder_name: Ministry of Science and ICT, South Korea
- identifier: RS-2024-00451579
  funder_name: Ministry of Science and ICT, South Korea

## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



## Specific property for specimen



## Process for specimen treatment



## Computational method



## Energy level/transition state



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## Fileset

- id: 0a3fbcc4-1a13-477c-b683-27d46c4a0c5b
  filename: 2025_Mater&Design_(Yoshida_HEA).pdf
  content_type: application/pdf
  size: 16151331
  md5: 0c1d024285e001261fd0b0ee19236462

## Thumbnail

fileset_id: 0a3fbcc4-1a13-477c-b683-27d46c4a0c5b
filename: 2025_Mater&Design_(Yoshida_HEA).pdf