# Phenomenology and Mechanisms of Hydrogen–Induced Solid Solution–Hardening in Fe–Cr–Ni Austenitic Steels

https://mdr.nims.go.jp/datasets/20cf744f-10d7-4230-a6cd-96d118982ffb

## File

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## Id

20cf744f-10d7-4230-a6cd-96d118982ffb

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-04-01T05:21:52.048754Z

## Updated at

2026-04-01T06:17:12.607420Z

## Published at

2026-04-01T07:26:12.561001Z

## Doi



## First published url

https://doi.org/10.2320/matertrans.mt-m2025161

## Date published

2026-04-01

## Recorded date published

2026

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Phenomenology and Mechanisms of Hydrogen–Induced Solid Solution–Hardening
    in Fe–Cr–Ni Austenitic Steels
  title_type: original
  lang: en

## Description

- description: 'As for the alloying additions of carbon (C) and nitrogen (N), the
    involvement of solute hydrogen (H) in face-centered-cubic (FCC) Fe-Cr-Ni-based
    austenitic steels causes considerable magnitude of solid solution-hardening. Notably,
    the strengthening ability of these three interstitial elements is almost comparable
    to each other, although H is significantly smaller than C and N in its atomic
    size. The present paper overviews the phenomenology of such H-induced solid solution-hardening
    and its underlying rationales in commercial 300-series Fe-Cr-Ni austenitic steels
    after uniform H-charging in pressurized gaseous H2 environment at elevated temperatures.
    The effects of H concentration, deformation temperature, strain rate, and chemical
    composition of the alloy, as well as the thermal activation process of deformation,
    are extensively reviewed based mainly on the authors’ recent works. Potential
    roles of three key factors: 1) solute drag of H atmosphere around a dislocation;
    2) H-diffusion-controlled glide of dislocation core; and 3) the presence of H-substitutional
    complex, are discussed in light of the conventionally established theories of
    dislocation dynamics and plasticity. The H-induced solid solution-hardening is
    maximized when the factors 1) and 2) (i.e., dynamic interactions between diffusible
    H and mobile dislocation) exert primary contributions to the flow stress. This
    fact is attributed to the exclusively high mobility of H atoms in austenite lattice
    even at around an ambient temperature, which is not the case for C and N that
    remain immobile during the deformation.'
  description_type: abstract
  lang: und

## Creator

- name: Yuhei Ogawa
  role: author
  orcid: https://orcid.org/0000-0003-2713-9822
- name: Osamu Takakuwa
  role: author
- name: Junichiro Moriyama
  role: author
- name: Haruki Nishida
  role: author
- name: Kaneaki Tsuzaki
  role: author
- name: Akinobu Shibata
  role: author
  orcid: https://orcid.org/0000-0001-8577-6411

## Contact agent



## Publisher

organization: Japan Institute of Metals

## Managing organization



## Keyword

- subject: Austenitic steel
  schema: not_defined
- subject: Hydrogen
  schema: not_defined
- subject: Solid solution-hardening
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: MATERIALS TRANSACTIONS
  issn: '13459678'
  volume: '67'
  issue: '4'
  article_number: MT-M2025161

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## Fileset

- id: 6f0604a8-ac65-46b1-bee3-8b4cf6a04ad6
  filename: 67_MT-M2025161.pdf
  content_type: application/pdf
  size: 4664549
  md5: 264fad66698272ae75f32628dbb796ab

## Thumbnail

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filename: 67_MT-M2025161.pdf