# Phase-separation induced dislocation-network cellular structures in Ti-Zr-Nb-Mo-Ta high-entropy alloy processed by laser powder bed fusion

https://mdr.nims.go.jp/datasets/486e42c4-d8a0-40aa-94b5-825cf34e1a61

## File

- [1-s2.0-S2214860425001010-main.pdf](https://mdr.nims.go.jp/filesets/5af5d1b9-c0ad-423b-bd5a-4c365638abc8/download) ([Detail](https://mdr.nims.go.jp/filesets/5af5d1b9-c0ad-423b-bd5a-4c365638abc8.md))

## Id

486e42c4-d8a0-40aa-94b5-825cf34e1a61

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-04-03T07:29:48.879513Z

## Updated at

2025-04-08T04:16:16.544892Z

## Published at

2025-04-07T13:19:38.397694Z

## Doi



## First published url

https://doi.org/10.1016/j.addma.2025.104737

## Date published

2025-03-12

## Recorded date published

2025-3

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Phase-separation induced dislocation-network cellular structures in Ti-Zr-Nb-Mo-Ta
    high-entropy alloy processed by laser powder bed fusion
  title_type: original
  lang: en

## Description

- description: Hierarchical structures, such as cellular structures, elemental segregations,
    and dislocation-network, are often proposed to enhance the mechanical properties
    of high-entropy alloys (HEAs) fabricated via additive manufacturing (AM). The
    formation of cellular structures is often attributed to elemental segregation
    during the solidification process or thermal strain resulting from the AM process.
    Here, we present a novel cellular structure where phase-separation and dislocation-network
    coupled in Ti-Zr-Nb-Mo-Ta HEA processed by laser powder bed fusion (L-PBF). Electron
    microscopy observations and X-ray diffraction (XRD) analyses show that this unique
    cellular structure consists of Zr-rich and Ta-rich body-center cubic (BCC) phases
    as the cell-wall and the cell-core, respectively, with their lattice constant
    difference of about 1 %. Moreover, a higher density of dislocations forming distinct
    networks is detected within this cellular structure, whose density reached 8 ×
    1014 m−2. Ma- chine learning analysis reveals that the dislocations preferentially
    occur on the Zr-rich BCC side, thus accom- modating the strains significant around
    the boundaries between the two BCC phases. With the aid of thermodynamic simulations,
    we propose a formation mechanism of the present cellular structure, which is governed
    by the elemental partitioning behavior of Zr and Ta during a solid-state phase
    separation under rapid cooling. Boundaries with this phase separation are introduced
    as semi-coherent interfaces with misfit disloca- tions, introducing a high-density
    dislocation in the present material. This novel cellular structure can signifi-
    cantly enhance the strength of AM HEAs, providing valuable insights for developing
    high-performance AM metals through the design of hierarchical microstructures.
  description_type: abstract
  lang: und

## Creator

- name: Han Chen
  role: author
- name: Daisuke Egusa
  role: author
- name: Zehao Li
  role: author
  organization: National Institute for Materials Science
- name: Taisuke Sasaki
  role: author
  orcid: https://orcid.org/0000-0002-5952-7638
  organization: National Institute for Materials Science
- name: Ryosuke Ozasa
  role: author
- name: Takuya Ishimoto
  role: author
- name: Masayuki Okugawa
  role: author
- name: Yuichiro Koizumi
  role: author
- name: Takayoshi Nakano
  role: author
- name: Eiji Abe
  role: author

## Contact agent



## Publisher

organization: Elsevier BV

## Managing organization



## Keyword

- subject: High-entropy alloy
  schema: not_defined
- subject: Laser powder bed fusion
  schema: not_defined
- subject: Cellular structure
  schema: not_defined
- subject: Phase separation
  schema: not_defined
- subject: Dislocation-network
  schema: not_defined
- subject: Electron microscopy
  schema: not_defined
- subject: Machine learning
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Additive Manufacturing
  issn: '22148604'
  volume: '102'
  article_number: '104737'

## Conference



## Related item



## Funding

- identifier: JPMJCR2194
  funder_name: Core Research for Evolutional Science and Technology
- funder_name: Shanghai Jiao Tong University
- funder_name: Ministry of Education, Culture, Sports, Science and Technology
- funder_name: Japan Science and Technology Agency

## 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: 5af5d1b9-c0ad-423b-bd5a-4c365638abc8
  filename: 1-s2.0-S2214860425001010-main.pdf
  content_type: application/pdf
  size: 19215432
  md5: 8bdee9a53bd983e5dd449757d50cfbf7

## Thumbnail

fileset_id: 5af5d1b9-c0ad-423b-bd5a-4c365638abc8
filename: 1-s2.0-S2214860425001010-main.pdf