# Insights into Creep Properties and Microstructure of Gr. 91 Steels with Varied Impurity Contents

https://mdr.nims.go.jp/datasets/d7b7a2d6-e1f7-4286-9dc7-0db3c5c26331

## File

- [66_ISIJINT-2026-044.pdf](https://mdr.nims.go.jp/filesets/fe4d6fd2-4486-4948-adc0-65894170ae2b/download) ([Detail](https://mdr.nims.go.jp/filesets/fe4d6fd2-4486-4948-adc0-65894170ae2b.md))

## Id

d7b7a2d6-e1f7-4286-9dc7-0db3c5c26331

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-07-29T10:25:39.985950Z

## Updated at

2026-07-29T23:37:06.964137Z

## Published at

2026-07-30T01:31:01.848128Z

## Doi



## First published url

https://doi.org/10.2355/isijinternational.isijint-2026-044

## Date published

2026-07-15

## Recorded date published

2026

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Insights into Creep Properties and Microstructure of Gr. 91 Steels with Varied
    Impurity Contents
  title_type: original
  lang: en

## Description

- description: 'The creep properties and microstructures of two types of Gr. 91 steel
    with different impurity (Sb, As, Sn) contents were investigated. The steel with
    higher impurity concentrations (Steel 1) ruptured in slightly shorter time than
    the steel with lower impurity concentrations (Steel 2). The reduction of area
    for Steel 1 was slightly lower than that for Steel 2 due to higher density of
    creep voids in Steel 1. However, no clear correlation was observed between impurity
    contents and either elongation or creep intolerance parameter (λ). Microstructural
    observation revealed that the effect of impurities on the initial microstructure
    was considered negligible. During creep, the crystallographic relationship between
    common rotation axes and rotation angles at block/packet boundaries gradually
    disappeared. Among block boundaries, <011>53° and <011>60° were found to be more
    susceptible to creep deformation, whereas <111>60° was relatively less sensitive. '
  description_type: abstract
  lang: und

## Creator

- name: Katsuhiro Sato
  role: author
  orcid: https://orcid.org/0000-0002-5419-4344
- name: Masatoshi Mitsuhara
  role: author
  orcid: https://orcid.org/0009-0005-3578-2684
- name: Takahiro Kimura
  role: author
- name: Yoshiki Shioda
  role: author
- name: Takuya Kawarasaki
  role: author
- name: Keiji Kubushiro
  role: author
- name: Satoshi Hata
  role: author
  orcid: https://orcid.org/0000-0001-6030-8363
- name: Kota Sawada
  role: author
  orcid: https://orcid.org/0000-0001-7780-1648
- name: Kazuhiro Kimura
  role: author
  orcid: https://orcid.org/0000-0001-7906-2703

## Contact agent



## Publisher

organization: Iron and Steel Institute of Japan

## Managing organization



## Keyword

- subject: creep strength enhanced ferritic steels
  schema: not_defined
- subject: Type 2 specification
  schema: not_defined
- subject: creep void
  schema: not_defined
- subject: segregation
  schema: not_defined
- subject: block/ packet boundaries
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin



## Embargo



## Journal

- title: ISIJ International
  issn: '09151559'
  volume: '66'
  issue: '8'
  article_number: ISIJINT-2026-044

## Conference



## Related item



## Funding



## 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: fe4d6fd2-4486-4948-adc0-65894170ae2b
  filename: 66_ISIJINT-2026-044.pdf
  content_type: application/pdf
  size: 5468160
  md5: 3efe796b23ac8b2aad8f8cc6c59d6c63

## Thumbnail

fileset_id: fe4d6fd2-4486-4948-adc0-65894170ae2b
filename: 66_ISIJINT-2026-044.pdf