# Origin of the trade-off relationship between tensile strength and hydrogen embrittlement resistance

https://mdr.nims.go.jp/datasets/ad81fb7d-c295-41fa-9458-3aec98ccb88e

## File

- [2026_Acta Materialia_HE-PAGB stress concentration_okada_compressed.pdf](https://mdr.nims.go.jp/filesets/bdb3ab02-9856-48cd-a4cb-7099f64ae686/download) ([Detail](https://mdr.nims.go.jp/filesets/bdb3ab02-9856-48cd-a4cb-7099f64ae686.md))

## Id

ad81fb7d-c295-41fa-9458-3aec98ccb88e

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-11-11T07:31:10.528438Z

## Updated at

2025-11-12T23:30:03.540317Z

## Published at

2025-11-12T23:22:05.696783Z

## Doi



## First published url

https://doi.org/10.1016/j.actamat.2025.121683

## Date published

2025-10-30

## Recorded date published

2026-1

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Origin of the trade-off relationship between tensile strength and hydrogen
    embrittlement resistance
  title_type: original
  lang: en

## Description

- description: 'To achieve widespread application of high-strength steels, such as
    martensitic steels, understanding the origin of the trade-off relationship between
    tensile strength and hydrogen embrittlement resistance is crucial. This study
    aimed to clarify the origin of the trade-off from a perspective of sensitivity
    to the hydrogen-induced intergranular fracture, which mainly occurs along prior
    austenite grain boundaries (PAGBs) among several types of high-angle boundaries
    in martensitic structures. Applying a digital image correlation (DIC)-based stress
    mapping technique, the distribution of the local stress during tensile loading
    was correlated with the martensitic structures; the stress concentration behaviors
    at PAGBs were compared among three as-quenched martensitic steels with different
    tensile strengths. The tensile strength, ranging from 1.25 to 1.65 GPa, was controlled
    by changing carbon composition and austenitization temperature (and resultant
    PAG size) in Fe-3Mn-C (wt.%) alloys. The intergranular fracture preferentially
    occurring at PAGBs is due to the low plastic relaxation ability of PAGBs relative
    to other substructure boundaries (within PAGs) and the resultant stress concentration
    at PAGBs. Additionally, it was demonstrated that as plastic relaxation at PAGBs
    crystallographically becomes more difficult relative to within PAGs, the consequent
    stress concentration at PAGBs increases, leading to more severe hydrogen embrittlement.
    The results demonstrated both the origin of the trade-off (i.e., carbon composition)
    and a strategy for breaking the trade-off (i.e., PAG refinement), and both can
    be understood in terms of the shared factors: sensitivity to the intergranular
    fracture, strongly depending on the local stress concentration at PAGBs related
    to variant selection behavior in the martensitic transformation.'
  description_type: abstract
  lang: und

## Creator

- name: Kazuho Okada
  role: author
  orcid: https://orcid.org/0000-0003-0183-4528
- name: Yukihisa Watase
  role: author
- name: Myeong-heom Park
  role: author
  orcid: https://orcid.org/0009-0006-1965-2676
- name: Kaneaki Tsuzaki
  role: author
- name: Akinobu Shibata
  role: author
  orcid: https://orcid.org/0000-0001-8577-6411

## Contact agent



## Publisher

organization: Elsevier BV

## Managing organization



## Keyword

- subject: 高強度鋼
  schema: not_defined
- subject: 水素脆化
  schema: not_defined
- subject: 応力集中
  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: '303'
  article_number: '121683'

## Conference



## Related item



## Funding

- funder_name: Japan Science and Technology Agency Strategic Basic Research Programs
    ACT-X
- funder_name: Iketani Science and Technology Foundation
- 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



## Software



## Custom property



## Fileset

- id: bdb3ab02-9856-48cd-a4cb-7099f64ae686
  filename: 2026_Acta Materialia_HE-PAGB stress concentration_okada_compressed.pdf
  content_type: application/pdf
  size: 6422009
  md5: 1fe1bd2852916bf1f76c0eebb12e64e8

## Thumbnail

fileset_id: bdb3ab02-9856-48cd-a4cb-7099f64ae686
filename: 2026_Acta Materialia_HE-PAGB stress concentration_okada_compressed.pdf