# Three-dimensional morphologies, substructures, and crystallography of pearlite in carbon steel

https://mdr.nims.go.jp/datasets/7dc088da-1b13-43a8-9230-2ada3a6fca81

## File

- [2025_STAM_pearlite.pdf](https://mdr.nims.go.jp/filesets/23861407-26e2-437d-be97-9cfe5136cd57/download) ([Detail](https://mdr.nims.go.jp/filesets/23861407-26e2-437d-be97-9cfe5136cd57.md))

## Id

7dc088da-1b13-43a8-9230-2ada3a6fca81

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-12-05T09:33:24.157407Z

## Updated at

2025-12-08T23:30:04.388256Z

## Published at

2025-12-08T23:24:13.332870Z

## Doi



## First published url

https://doi.org/10.1080/14686996.2025.2523242

## Date published

2025-12-31

## Recorded date published

2025-12-31

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Three-dimensional morphologies, substructures, and crystallography of pearlite
    in carbon steel
  title_type: original
  lang: en

## Description

- description: The present study examined the morphology, substructure, crystallography,
    and element distribution of as-transformed (air-cooled) pearlite in medium-carbon
    steel using focused ion beam-scanning electron microscopy serial sectioning and
    advanced transmission electron microscopy analysis. The three-dimensional analysis
    revealed that the cementite did not exhibit a fully continuous lamellar structure,
    and the long axis direction of non-continuous region was nearly identical within
    each cementite lamella and among the adjacent cementite lamellae. The measured
    macroscopic interfacial plane orientation ranged from (0 1 0)θ to (-1 2 0)θ and
    (-2 -1 5)α to (-1 -1 1)α. The growth directions of cementite lamellae tended to
    align with the invariant line between cementite and ferrite, as well as the parallel
    direction in the Pitsch-Petch relationship. Even within a single colony, the orientations
    of both the ferrite and cementite regions changed discontinuously, forming low-angle
    boundaries, some of which exhibited a staircase-like shape. The orientation relationship
    between ferrite and cementite changed slightly at the low-angle boundary within
    a colony. This indicates that when the accumulated misfit strain exceeds a certain
    value, the parallel direction relationship changes to accommodate the accumulated
    strain while maintaining a nearly identical orientation relationship. The concentration
    inside cementite lamella was not completely homogeneous; manganese and chromium
    were enriched, while carbon was depleted, at the lamellar interface. We surmised
    that the inhomogeneous element distribution in cementite lamella could be attributed
    to the incomplete partitioning behavior of alloying elements at transformation,
    as well as their segregation at the lamellar interface, aiming to reduce interfacial
    energy.
  description_type: abstract
  lang: und

## Creator

- name: Akinobu Shibata
  role: author
  orcid: https://orcid.org/0000-0001-8577-6411
  organization: National Institute for Materials Science
- name: Akiko Nakamura
  role: author
  organization: National Institute for Materials Science
- name: Taku Moronaga
  role: author
  orcid: https://orcid.org/0000-0002-6915-0627
  organization: National Institute for Materials Science
- name: Kazuho Okada
  role: author
  orcid: https://orcid.org/0000-0003-0183-4528
  organization: National Institute for Materials Science
- name: Toru Hara
  role: author
  orcid: https://orcid.org/0000-0002-9715-6444
  organization: National Institute for Materials Science
- name: Rintaro Ueji
  role: author
  orcid: https://orcid.org/0000-0001-6969-3165
  organization: National Institute for Materials Science

## Contact agent



## Publisher

organization: Informa UK Limited

## Managing organization



## Keyword

- subject: Pearlitic steel
  schema: not_defined
- subject: microstructure formation mechanism
  schema: not_defined
- subject: transmission electron microscopy
  schema: not_defined
- subject: serial-sectioning
  schema: not_defined
- subject: crystallography
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Science and Technology of Advanced Materials
  issn: '14686996'
  volume: '26'
  issue: '1'
  start_page: 2523242
  end_page: 2523242
  article_number: '2523242'

## Conference



## Related item



## Funding

- identifier: JPMXP1122684766
  funder_name: 'MEXT Program: Data Creation and Utilization Type Material Research
    and Development Project'
- identifier: JPMXP1223NM5284
  funder_name: ARIM of MEXT
- funder_name: Electron Microscopy Unit, National Institute for Materials Science
- identifier: JP22K18910
  funder_name: JSPS KAKENHI
- funder_name: ISIJ Research Project

## Instrument



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## Specimen



## Chemical composition



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## Fileset

- id: 23861407-26e2-437d-be97-9cfe5136cd57
  filename: 2025_STAM_pearlite.pdf
  content_type: application/pdf
  size: 41773292
  md5: 84606881092be703225421c33f5f8cda

## Thumbnail

fileset_id: 23861407-26e2-437d-be97-9cfe5136cd57
filename: 2025_STAM_pearlite.pdf