# Role of Oxygen in Work Hardening and Fatigue Deformation of {0001}10-10> Textured Titanium Alloys

https://mdr.nims.go.jp/datasets/38a6ccbb-7554-4df6-8422-efaf00704842

## File

- [20251215Ti-O alloy_Morita.docx](https://mdr.nims.go.jp/filesets/e84b1c95-8ced-4187-8554-b48946ce6bf2/download) ([Detail](https://mdr.nims.go.jp/filesets/e84b1c95-8ced-4187-8554-b48946ce6bf2.md))

## Id

38a6ccbb-7554-4df6-8422-efaf00704842

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-08-15T11:27:13.671830Z

## Updated at

2026-08-24T05:42:32.794684Z

## Published at

2026-08-24T07:27:40.055169Z

## Doi

https://doi.org/10.48505/nims.6475

## First published url



## Date published



## Recorded date published



## Resource type

conference_presentation

## Manuscript type

na

## Collection



## Title

- title: Role of Oxygen in Work Hardening and Fatigue Deformation of {0001}<10-10>
    Textured Titanium Alloys
  title_type: original
  lang: en

## Description

- description: Ti-0.21 mass%O and Ti-0.71 mass%O with {0001}<10-10> texture were prepared,
    and their tensile and fatigue properties were investigated. In tensile tests,
    Ti-0.71 mass%O exhibited higher elongation than that of Ti-0.21 mass%O. Furthermore,
    the work-hardening rate of Ti-0.71 mass%O remained high until the end of deformation.
    The pyramidal slip in Ti-0.71 mass%O alloy was activated, and the number of active
    slip systems increased. The enhanced work-hardening behavior is likely associated
    with increased dislocation interactions promoted by the texture-controlled slip
    activity. Cyclic and dwell fatigue tests were conducted on both Ti-O alloys. Ti-0.21
    mass%O alloy exhibited significant elongation and ductile fracture under both
    cyclic and dwell fatigue at a cyclic stress of 90% of the 0.2% proof stress. In
    contrast, Ti-0.71 mass%O alloy showed lower elongation and the formation of localized
    strain fields near grain boundaries. Similar fatigue deformation behavior was
    observed even when the cyclic stress was reduced to 60% of the 0.2% proof stress.
    Ti-0.71 mass%O alloy contained a high density of pinned, sessile dislocations,
    which limited dislocation pile-up lengths and hindered the activation of dislocation
    sources such as the Frank-Read source. Consequently, oxygen addition modified
    the fatigue deformation behavior by limiting dislocation multiplication under
    cyclic and dwell loading.
  description_type: abstract
  lang: eng

## Creator

- name: Motoaki Morita
  role: author
  organization: Tokyo University of Marine Science and Technology
- name: Shogo Hara
  role: author
  organization: Tokyo University of Marine Science and Technology
- name: Yoshiaki Toda
  role: author
  orcid: https://orcid.org/0000-0002-8343-2890
  organization: National Institute for Materials Science
  department: Center for Basic Research on Materials/Data-driven Materials Research
    Field/Materials Modeling Group
- name: Osamu Umezawa
  role: author
  organization: Yokohama National University

## Contact agent



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## Keyword

- subject: Ti-O alloy
  schema: not_defined
- subject: texture
  schema: not_defined
- subject: tensile strength
  schema: not_defined
- subject: fatigue property
  schema: not_defined
- subject: elongation
  schema: not_defined
- subject: work-hardening
  schema: not_defined
- subject: slip system
  schema: not_defined

## Rights

- identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal



## Conference

name: The 12th Pacific Rim International Conference on Advanced Materials and Processing
start_date: 2026-08-09
end_date: 2026-08-13
identifier: https://www.pricm12.org/

## Related item



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## Instrument



## Instrument operator



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## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



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## Fileset

- id: e84b1c95-8ced-4187-8554-b48946ce6bf2
  filename: 20251215Ti-O alloy_Morita.docx
  content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
  size: 25941
  md5: 3be642fb6828454c43a6b6dfc05f84e5

## Thumbnail

fileset_id: e84b1c95-8ced-4187-8554-b48946ce6bf2
filename: 20251215Ti-O alloy_Morita.docx