# Hydrogen embrittlement in Al–Zn–Mg alloys: Semispontaneous decohesion of precipitates

https://mdr.nims.go.jp/datasets/0407ea29-50dd-4b00-97d2-b16b5b7c6fb8

## File

- [05dc08fa-ae0b-9c21-78e7-77b5883c0f65.pdf](https://mdr.nims.go.jp/filesets/b5fb695f-7878-4d98-a671-d39a79d77447/download) ([Detail](https://mdr.nims.go.jp/filesets/b5fb695f-7878-4d98-a671-d39a79d77447.md))

## Id

0407ea29-50dd-4b00-97d2-b16b5b7c6fb8

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-12-27T09:31:53.772509Z

## Updated at

2026-01-05T05:33:57.418735Z

## Published at

2026-01-05T07:20:02.887833Z

## Doi



## First published url

https://doi.org/10.1016/j.ijhydene.2025.02.123

## Date published

2025-02-18

## Recorded date published

2025-3

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: 'Hydrogen embrittlement in Al–Zn–Mg alloys: Semispontaneous decohesion of
    precipitates'
  title_type: original
  lang: en

## Description

- description: Our study investigates how hydrogen trapped at interfaces of MgZn2
    precipitates affects hydrogen embrittlement in Al–Zn–Mg alloys. Al–Zn–Mg alloys
    featuring various aged microstructures were prepared, and their hydrogen embrittlement
    behaviors were monitored in situ during tensile tests via synchrotron radiation
    X-ray micro- tomography. The changes in the interfacial properties of MgZn2 instigated
    a discernible transition in the qua- sicleavage and intergranular fractures. First-principles
    calculations revealed that the hydrogen trapping energy at semicoherent interfaces
    of MgZn2 is significantly high at 0.56 eV/atom, and multiple hydrogen trapping
    leads to a substantial reduction in interfacial cohesive energy. Hydrogen partitioning
    analysis of all trapping sites, including vacancies, grain boundaries, and MgZn2
    interfaces, demonstrated that in overaged alloys, more than 90% of the hydrogen
    was trapped at semicoherent interfaces. The hydrogen trapped at the semicoherent
    interface of MgZn2 decreased the interfacial cohesive energy, causing semispontaneous
    decohesion and quasi- cleavage fracture in the Al–Zn–Mg alloys.
  description_type: abstract
  lang: und

## Creator

- name: Kazuyuki Shimizu
  role: author
- name: Hiroyuki Toda
  role: author
- name: Kyosuke Hirayama
  role: author
- name: Hiro Fujihara
  role: author
- name: Tomohito Tsuru
  role: author
- name: Masatake Yamaguchi
  role: author
- name: Taisuke T. Sasaki
  role: author
  orcid: https://orcid.org/0000-0002-5952-7638
  organization: National Institute for Materials Science
- name: Masayuki Uesugi
  role: author
- name: Akihisa Takeuchi
  role: author

## Contact agent



## Publisher

organization: Elsevier BV

## Managing organization



## Keyword

- subject: Hydrogen embrittlement
  schema: not_defined
- subject: Al–Zn–Mg alloys
  schema: not_defined
- subject: Aluminum alloys
  schema: not_defined
- subject: X-ray tomography
  schema: not_defined
- subject: First-principles calculations
  schema: not_defined

## Rights

- description: "Published by Elsevier Ltd on behalf of Hydrogen Energy Publications
    LLC. This is an open access article under the CC BY license\r\n(http://creativecommons.org/licenses/by/4.0/)."
  identifier: https://creativecommons.org/licenses/by/4.0/
  date_licensed: 2025-02-20

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: International Journal of Hydrogen Energy
  issn: '03603199'
  volume: '109'
  start_page: 1421
  end_page: 1436

## Conference



## Related item



## Funding

- identifier: JPMJCR1995
  funder_name: Japan Science and Technology Agency
  description: CREST
- identifier: 23K04413
  funder_name: JSPS
  description: Grant-in-Aid for Scientific Research
- funder_name: Light Metal Educational Founda

## 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: b5fb695f-7878-4d98-a671-d39a79d77447
  filename: 05dc08fa-ae0b-9c21-78e7-77b5883c0f65.pdf
  content_type: application/pdf
  size: 17228327
  md5: 247a262168eb285f0af87c30f655fb4f

## Thumbnail

fileset_id: b5fb695f-7878-4d98-a671-d39a79d77447
filename: 05dc08fa-ae0b-9c21-78e7-77b5883c0f65.pdf