# Effect of deformation temperature on strain localization phenomena in an austenitic Fe-30Mn-6.5Al-0.3C low-density steel

https://mdr.nims.go.jp/datasets/872fe48e-0483-4d80-b6ac-33cd6401c69b

## Files

- [2024-Acta Mater 264 (2024) 119566.pdf](https://mdr.nims.go.jp/filesets/d043e64b-cafb-48f3-9206-e07e250b79da/download) ([Detail](https://mdr.nims.go.jp/filesets/d043e64b-cafb-48f3-9206-e07e250b79da.md))

## Id

872fe48e-0483-4d80-b6ac-33cd6401c69b

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-11-20T06:24:23.140765Z

## Updated at

2024-11-21T07:30:25.291375Z

## Published at

2024-11-21T07:30:25.380159Z

## Doi



## First published url

https://doi.org/10.1016/j.actamat.2023.119566

## Date published

2023-12-02

## Recorded date published

2024-1

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Effect of deformation temperature on strain localization phenomena in an
    austenitic Fe-30Mn-6.5Al-0.3C low-density steel
  title_type: original
  lang: en

## Description

- description: We have investigated the influence of the deformation temperature from
    25°C (RT) to -196°C on the dislocation structures associated with strain localization
    phenomena in an austenitic Fe-30Mn-6.5Al-0.3C (wt.%) low-density steel by combined
    electron channeling contrast imaging (ECCI) and electron backscatter diffraction
    (EBSD) techniques. The main characteristics of the dislocation structures were
    evaluated on the main texture components, i.e. <111>//tensile axis, <112>//tensile
    axis, and <001>//tensile axis directions. Cryogenic deformation temperatures promote
    the inhomogeneous character of the plastic behavior due to the enhanced formation
    of dislocation structures associated with strain localization, namely microbands
    (MBs) and deformation bands (DBs). The deformation temperature has a strong influence
    on the thermal-assisted dislocation processes controlling the dislocation configurations
    and MB formation mechanisms. MB nucleation mechanism evolves from a cross-slip
    assisted mechanism (RT) to a slip band-assisted mechanism (cryogenic temperatures).
    This effect has a profound effect on the grain orientation dependence of the MB
    structure but does not influence its crystallographic alignment. From a mechanical
    standpoint, cryogenic deformation temperatures enhance strain-hardening due to
    the activation at moderated strain levels (0.3) of a hardening stage associated
    with secondary twinning. This effect is associated with the reduction of the γ_SFE
    at cryogenic temperatures. ECCI analysis reveals MBs and DBs have a small contribution
    to strain-hardening and ductility. These effects are associated with the small
    mechanical resistance of these dislocation structures against the advance of twin
    boundaries and dense dislocation layers, and the comparatively small plastic strain
    accommodated by these structures, respectively.
  description_type: abstract
  lang: und

## Creator

- name: Ivan Gutierrez-Urrutia
  role: author
  orcid: https://orcid.org/0000-0003-1438-3703
  organization: National Institute for Materials Science
- name: Akinobu Shibata
  role: author
  orcid: https://orcid.org/0000-0001-8577-6411
  organization: National Institute for Materials Science

## Contact agent



## Publisher

organization: Elsevier BV

## Managing organization



## Keyword

- subject: FeMnAlC low-density steels
  schema: not_defined
- subject: Strain localization
  schema: not_defined
- subject: Austenitic steels
  schema: not_defined
- subject: Strain-hardening
  schema: not_defined
- subject: Electron channeling contrast imaging (ECCI)
  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: '264'
  article_number: '119566'

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## Fileset

- id: d043e64b-cafb-48f3-9206-e07e250b79da
  filename: 2024-Acta Mater 264 (2024) 119566.pdf
  content_type: application/pdf
  size: 37184726
  md5: 205f523dc7a32578e1fb15a6b9cff87d

## Thumbnail

fileset_id: d043e64b-cafb-48f3-9206-e07e250b79da
filename: 2024-Acta Mater 264 (2024) 119566.pdf