# Influence of austenite grain boundary misorientation on hydrogen-induced intergranular crack propagation in a medium carbon martensitic steel

https://mdr.nims.go.jp/datasets/0f35fcf5-148e-4ff7-8214-ddfbccd8d19d

## File

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## Id

0f35fcf5-148e-4ff7-8214-ddfbccd8d19d

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-11-01T02:55:40.618825Z

## Updated at

2024-11-01T07:30:16.919121Z

## Published at

2024-11-01T07:30:18.183673Z

## Doi



## First published url

https://doi.org/10.1016/j.actamat.2024.120036

## Date published

2024-05-23

## Recorded date published

2024-8

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Influence of austenite grain boundary misorientation on hydrogen-induced
    intergranular crack propagation in a medium carbon martensitic steel
  title_type: original
  lang: en

## Description

- description: This study investigated the influence of austenite misorientation on
    hydrogen-induced intergranular cracking along the prior austenite grain boundary
    (PAGB) in a medium C tempered martensitic steel. Utilizing EBSD analysis and prior
    austenite orientation reconstruction, distributions of martensite misorientation
    and prior austenite misorientation across PAGBs were compared in both fractured
    and total PAGBs. The comparison suggests that presence of low misorientation martensite
    segments at PAGB was beneficial to suppress PAGB cracking in accordance with the
    previous study. This low misorientation martensite segments are more likely to
    be achieved when misorientation is either less than 10o (L-PAGB), or over 45o
    (H-PAGB) with a specific condition. The requirements for H-PAGB to achieve low
    misorientation martensite segment were investigated by applying interrupt quenching
    treatment, which can capture the initial nucleation of martensite. The result
    suggests that the nucleated martensite should hold near Kurdjumov-Sachs orientation
    relationship (KS OR) not only with austenite into which it grows, but also with
    opposite austenite sharing the grain boundary (double KS OR) to achieve low misorientation
    martensite segments. The double KS OR is satisfied in most of martensite nucleated
    in the early stage, indicating the importance of the variant selection to achieve
    low misorientation martensite segments at PAGB.
  description_type: abstract
  lang: und

## Creator

- name: Ji Hoon Kim
  role: author
- name: Goro Miyamoto
  role: author
- name: Akinobu Shibata
  role: author
  orcid: https://orcid.org/0000-0001-8577-6411
  organization: National Institute for Materials Science
- name: Tomohiko Hojo
  role: author
- name: Motomichi Koyama
  role: author
- name: Yongjie Zhang
  role: author
- name: Tadashi Furuhara
  role: author

## Contact agent



## Publisher

organization: Elsevier BV

## Managing organization



## Keyword

- subject: Hydrogen embrittlement
  schema: not_defined
- subject: Intergranular fracture
  schema: not_defined
- subject: Prior austenite grain boundary (PAGB)
  schema: not_defined
- subject: Misorientation angle
  schema: not_defined
- subject: Martensite variant selection
  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: Acta Materialia
  issn: '13596454'
  volume: '274'
  article_number: '120036'

## Conference



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## Funding

- funder_name: Government of Japan Ministry of Education Culture Sports Science and
    Technology
- funder_name: National Research Foundation of Korea
- funder_name: New Energy and Industrial Technology Development Organization

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## Fileset

- id: af552a7c-72c7-439b-b313-6d2b55e819ba
  filename: 2024_Acta_(SCM_HE_Kim).pdf
  content_type: application/pdf
  size: 13940630
  md5: 558610368186274bd0ab0fe6f12a5bf0

## Thumbnail

fileset_id: af552a7c-72c7-439b-b313-6d2b55e819ba
filename: 2024_Acta_(SCM_HE_Kim).pdf