# Deformation mechanisms of hexagonal close-packed-multi-principal element alloys (HCP-MPEAs) with equiaxed structures

https://mdr.nims.go.jp/datasets/2313b0c5-bc0a-4912-bf23-d62682578c5f

## Files

- [20250311MSEA-D-24-07824_R1-5-clean.pdf](https://mdr.nims.go.jp/filesets/cc164d19-306d-46bf-8028-a3e1228d120e/download) ([Detail](https://mdr.nims.go.jp/filesets/cc164d19-306d-46bf-8028-a3e1228d120e.md))

## Id

2313b0c5-bc0a-4912-bf23-d62682578c5f

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-03-11T06:28:44.991765Z

## Updated at

2025-03-12T07:30:17.924269Z

## Published at

2025-03-12T07:30:19.037873Z

## Doi

https://doi.org/10.48505/nims.5361

## First published url

https://doi.org/10.1016/j.msea.2025.148143

## Date published

2025-03-04

## Recorded date published

2025-5

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Deformation mechanisms of hexagonal close-packed-multi-principal element
    alloys (HCP-MPEAs) with equiaxed structures
  title_type: original
  lang: en

## Description

- description: The solid solution strengthening and deformation mechanisms of HCP-MPEAs
    remain insufficiently understood due to the absence of alloys with stable single-phase
    HCP structures. In this study, single equiaxed HCP structures were successfully
    fabricated in Ti45Zr45Al10, Ti34Zr33Hf33, Ti35Zr30Hf30Al5, and Ti30Zr30Hf30Al10
    alloys through the thermomechanical processing and subsequent heat treatment.
    The Ti45Zr45Al10, Ti30Zr30Hf30Al10, and Ti35Zr30Hf30Al5 alloys exhibit excellent
    0.2 % proof strength from room temperature to 600 °C. The 0.2 % proof stress tends
    to increase with increasing mixing entropy and the average atomic radius misfit
    (δ), consistent with calculations showing that the solid solution strengthening
    effect increases with increasing the δ. Density functional theory (DFT) calculations
    further indicate that Al contributes significantly to this increase in solid solution
    strengthening. The deformation is dominated by (1010) prismatic slip. The low
    activation volume and high stress exponent of these alloys at 600 °C suggest minor
    obstacles such as cluster or short-range order inhibit the movement of dislocation
    and lead to significant solid-solution strengthening.
  description_type: abstract
  lang: und

## Creator

- name: S.J. Liang
  role: author
- name: T. Yoshino
  role: author
- name: R. Matusmoto
  role: author
- name: R. Sahara
  role: author
  orcid: https://orcid.org/0000-0003-0788-2985
- name: Y. Toda
  role: author
  orcid: https://orcid.org/0000-0002-8343-2890
- name: S. Matsunaga
  role: author
  orcid: https://orcid.org/0000-0001-7285-5372
- name: G. Miyamoto
  role: author
  orcid: https://orcid.org/0000-0001-7998-8637
- name: Y. Yamabe-Mitarai
  role: author
  orcid: https://orcid.org/0000-0002-9674-5503

## Contact agent



## Publisher

organization: Elsevier BV

## Managing organization



## Keyword

- subject: Hexagonal close-packed-multi-principal
  schema: not_defined
- subject: Element alloys (HCP-MPEAs)
  schema: not_defined
- subject: Thermomechanical processing
  schema: not_defined
- subject: Equiaxed HCP phase
  schema: not_defined
- subject: High-temperature strength
  schema: not_defined
- subject: Deformation mechanism
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin



## Embargo



## Journal

- title: 'Materials Science and Engineering: A'
  issn: '09215093'
  volume: '929'
  article_number: '148143'

## Conference



## Related item



## Funding

- identifier: 21H05198
  funder_name: Japan Society for the Promotion of Science
- funder_name: Light Metal Educational Foundation

## 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



## Software



## Custom property



## Fileset

- id: cc164d19-306d-46bf-8028-a3e1228d120e
  filename: 20250311MSEA-D-24-07824_R1-5-clean.pdf
  content_type: application/pdf
  size: 2631601
  md5: d9639ed23b4f45e4a954239d43c5d919

## Thumbnail

fileset_id: cc164d19-306d-46bf-8028-a3e1228d120e
filename: 20250311MSEA-D-24-07824_R1-5-clean.pdf