# Relative contributions of solutes and forest dislocations to thermally activated plasticity in hydrogen-alloyed Fe-Cr-Ni austenitic steels: analyzing stress-dependence of Haasen plot

https://mdr.nims.go.jp/datasets/6faa65db-1b1c-4fbe-895a-a93da65e33c5

## File

- [1-s2.0-S1359645426006786-main.pdf](https://mdr.nims.go.jp/filesets/2b8d59a8-5a1f-452b-9db1-ad6cdbd38113/download) ([Detail](https://mdr.nims.go.jp/filesets/2b8d59a8-5a1f-452b-9db1-ad6cdbd38113.md))

## Id

6faa65db-1b1c-4fbe-895a-a93da65e33c5

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-08-03T22:31:18.267680Z

## Updated at

2026-08-03T23:31:23.083793Z

## Published at

2026-08-04T01:45:59.939757Z

## Doi



## First published url

https://doi.org/10.1016/j.actamat.2026.122577

## Date published

2026-07-20

## Recorded date published

2026-9

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: 'Relative contributions of solutes and forest dislocations to thermally activated
    plasticity in hydrogen-alloyed Fe-Cr-Ni austenitic steels: analyzing stress-dependence
    of Haasen plot'
  title_type: original
  lang: en

## Description

- description: A competitive relationship between solute atoms and forest dislocations
    in determining the kinetics of thermally activated plasticity was studied for
    a Type310S (Fe-24Cr-19Ni) austenitic steel containing ∼8500 at ppm hydrogen (H),
    where solute H promotes solid solution-hardening through an increase in the effective
    stress. The investigation was performed by constructing Haasen plot (i.e., strain
    rate sensitivity (SRS) vs. flow stress) based on stress relaxation tests, and
    by analyzing its evolution in relation to the decay of effective stress. In the
    regime of high effective stress, alloying solute elements—whose overcoming by
    dislocations is retarded by the presence of H—acted as primary rate-controlling
    obstacles to dislocations, giving rise to a relatively large and strain-independent
    SRS. In terms of Haasen plot, these manifested as an increase in the intercept
    and a decrease in the slope. Beyond the phenomenological findings of these H-induced
    characteristic changes, the present study elaborates their physical origin and
    transient nature. As the effective stress decreased and dislocation density increased,
    such predominance of solutes was progressively taken over by forest dislocations,
    leading the Haasen plot for H-charged specimens to approach that for non-charged
    specimen. These new insights further establish how H, alloying elements, and forest
    dislocations sequentially compete as rate-controlling obstacles depending on mechanical
    loading condition and internal state of the material.
  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: Plastic deformation
  schema: not_defined
- subject: Dislocations
  schema: not_defined
- subject: Thermal activation
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin



## Embargo



## Journal

- title: Acta Materialia
  issn: '13596454'
  volume: '317'
  article_number: '122577'

## Conference



## Related item



## Funding

- funder_name: Japan Society for the Promotion of Science
- funder_name: Iketani Science and Technology 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



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## Fileset

- id: 2b8d59a8-5a1f-452b-9db1-ad6cdbd38113
  filename: 1-s2.0-S1359645426006786-main.pdf
  content_type: application/pdf
  size: 6407689
  md5: 02d89bcc74c3466ea07ffdc6f8f294ff

## Thumbnail

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filename: 1-s2.0-S1359645426006786-main.pdf