# Plastic flow in Fe-Cr-Ni austenitic steel under the presence of solute H: A study via room temperature creep

https://mdr.nims.go.jp/datasets/7bef4b27-b098-448e-9220-f2f5c319f8aa

## Files

- [1-s2.0-S1359645424010073-main.pdf](https://mdr.nims.go.jp/filesets/b9da3025-5a91-46b3-a6b4-e2b0d41c540f/download) ([Detail](https://mdr.nims.go.jp/filesets/b9da3025-5a91-46b3-a6b4-e2b0d41c540f.md))

## Id

7bef4b27-b098-448e-9220-f2f5c319f8aa

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-01-09T02:03:56.239749Z

## Updated at

2025-01-09T07:31:01.938216Z

## Published at

2025-01-20T03:30:59.322910Z

## Doi



## First published url

https://doi.org/10.1016/j.actamat.2024.120659

## Date published

2024-12-16

## Recorded date published

2025-2

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: 'Plastic flow in Fe-Cr-Ni austenitic steel under the presence of solute H:
    A study via room temperature creep'
  title_type: original
  lang: en

## Description

- description: A connection between the effects of solute hydrogen (H) on macroscopic
    flow stress and microscopic dislocation mobility has been a subject for understanding
    the plastic flow behavior of H-charged austenitic steels and other face-centered
    cubic (FCC) alloys. In this study, we try to solve this problem by examining the
    room temperature creep of a Fe-24Cr-19Ni-based Type310S austenitic stainless steel
    uniformly charged with 9000 at. ppm solute H in a pressurized gaseous H2 environment.
    Stress-dip test to decompose the flow stress into effective (thermal) and internal
    (athermal) stresses, as well as a brief analysis of dislocation structure development
    in deformed uncharged and H-charged samples by electron channeling contrast imaging
    and hardness measurement, were supplementally employed. It is emphasized that
    solute H atoms consistently act as short-range obstacles hindering the movement
    of dislocations and thereby causes significant solid solution-hardening. Nevertheless,
    two opposite H-effects to accelerate and retard the creep rate were macroscopically
    identified depending on whether the stress level applied to H-charged specimens
    is above or below the flow stress under non-charged condition. These newly found,
    seemingly contradicting phenomena were interpreted based on the stress-dependent
    change of the rate-controlling mechanisms predominating thermally activated dislocation
    motion. Primary rate-controlling obstacles are H atoms themselves when creep acceleration
    manifests at high stress, while H atoms, other alloying elements, and forest dislocations
    cooperatively work to retard creep under low stress. The potential model of dislocation
    motion under the presence of these multiple obstacle types is finally proposed.
  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: Plasticity
  schema: not_defined
- subject: Hydrogen
  schema: not_defined
- subject: Themal activation
  schema: not_defined

## Rights

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

## Other identifier(s)



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## Embargo



## Journal

- title: Acta Materialia
  issn: '13596454'
  volume: '285'
  article_number: '120659'

## Conference



## Related item



## Funding

- funder_name: National Institute for Materials Science
- funder_name: Kyushu University
- identifier: JP21K14045
  funder_name: Japan Society for the Promotion of Science
- identifier: 24K17180
  funder_name: Japan Society for the Promotion of Science

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## Fileset

- id: b9da3025-5a91-46b3-a6b4-e2b0d41c540f
  filename: 1-s2.0-S1359645424010073-main.pdf
  content_type: application/pdf
  size: 5597570
  md5: 5a26c0d84b111751745bb6cfe532e9d0

## Thumbnail

fileset_id: b9da3025-5a91-46b3-a6b4-e2b0d41c540f
filename: 1-s2.0-S1359645424010073-main.pdf