# Refining hydrogen-dislocation interaction model for thermally activated plasticity in Fe-Cr-Ni austenitic steels: analyzing stress-dependent activation volume

https://mdr.nims.go.jp/datasets/006b821b-bd62-4e94-935a-6e33c9e39f2c

## File

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## Id

006b821b-bd62-4e94-935a-6e33c9e39f2c

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-01-14T04:13:17.197440Z

## Updated at

2026-01-14T04:17:53.526555Z

## Published at

2026-01-14T07:22:12.842803Z

## Doi



## First published url

https://doi.org/10.1016/j.actamat.2026.121896

## Date published

2026-01-03

## Recorded date published

2026-3

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: 'Refining hydrogen-dislocation interaction model for thermally activated
    plasticity in Fe-Cr-Ni austenitic steels: analyzing stress-dependent activation
    volume'
  title_type: original
  lang: en

## Description

- description: Understanding the role of diffusible solute hydrogen (H) as an obstacle
    to dislocation glide is essential for elucidating the solid solution-hardening
    mechanisms induced by H in Fe-Cr-Ni austenitic steels and other face-centered
    cubic (FCC) alloys. In the present study, we address this issue through an effective
    use of classical stress relaxation tests with a relatively long duration (∼1000
    s) at 295 K. A Type310S (Fe–24Cr–19Ni) austenitic stainless steel was examined
    after uniformly pre-charging ∼8500 at ppm H under a pressurized high-temperature
    gaseous H₂ environment. The activation volume, V (i.e., a material volume involved
    in an elementary obstacle-dislocation interaction), as a function of externally
    applied stress, was analyzed to probe the impact of H on thermally activated dislocation
    motion through a field of multiple obstacle types. A unified stress–V relationship
    was identified for both non- and H-charged specimens, in addition to an H-induced
    retardation of deformation kinetics under an equivalent stress level. These findings
    demonstrate that the primary obstacles to dislocation motion are alloying elements
    (and forest dislocations) even under the presence of H, with H contributing an
    additional activation barrier to overcome these inherent obstacle types.
  description_type: abstract
  lang: und

## Creator

- name: Yuhei Ogawa
  role: author
  orcid: https://orcid.org/0000-0003-2713-9822
- name: Akinobu Shibata
  role: author
  orcid: https://orcid.org/0000-0001-8577-6411

## Contact agent



## Publisher

organization: Elsevier BV

## Managing organization



## Keyword

- subject: Austenitic steel
  schema: not_defined
- subject: Hydrogen
  schema: not_defined
- subject: Dislocations
  schema: not_defined
- subject: Thamal activation
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Acta Materialia
  issn: '13596454'
  volume: '306'
  article_number: '121896'

## Conference



## Related item



## Funding

- funder_name: Japan Society for the Promotion of Science

## 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: 6cdc179f-e06b-4cb4-869f-6e1da4f2a6a6
  filename: Ogawa (2026)_AM.pdf
  content_type: application/pdf
  size: 6776436
  md5: 627e0b50ee732c9305132dbd0239127a

## Thumbnail

fileset_id: 6cdc179f-e06b-4cb4-869f-6e1da4f2a6a6
filename: Ogawa (2026)_AM.pdf