# Creep Deformation of Ti Alloys Produced by LPBF

https://mdr.nims.go.jp/datasets/20458f5c-8355-4497-8431-db15c0437a45

## File

- [20251203PRICM12_Abstract_template_Mitarai.pdf](https://mdr.nims.go.jp/filesets/3f8eca09-fa92-419d-9411-6d9a3fa8fb89/download) ([Detail](https://mdr.nims.go.jp/filesets/3f8eca09-fa92-419d-9411-6d9a3fa8fb89.md))

## Id

20458f5c-8355-4497-8431-db15c0437a45

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-08-15T12:24:02.109833Z

## Updated at

2026-08-24T05:50:53.410998Z

## Published at

2026-08-24T07:27:36.124834Z

## Doi

https://doi.org/10.48505/nims.6476

## First published url



## Date published



## Recorded date published



## Resource type

conference_presentation

## Manuscript type

na

## Collection



## Title

- title: Creep Deformation of Ti Alloys Produced by LPBF
  title_type: original
  lang: en

## Description

- description: "The laser powder bed fusion (LPBF) was applied for near α (hcp)-Ti
    alloy (Ti-6Al-4Nb- 4Zr, mass%) and near β (bcc)-Ti alloy (Ti-6Al-2Sn-4Zr-6Mo)
    to investigate microstructure evolution depending on scanning conditions and creep
    deformation behavior related to micro-structure.\r\nThe melting pool boundaries
    that are formed by cyclic heating due to cyclic scanning of the laser beam were
    clearly observed in the as-built state in both alloys. The crystallographic orientation
    of the b phase was random in near α-Ti alloys, while columnar microstructures
    with crystallographic lamellar-like microstructure (CLM), a near single crystal-like
    micro-structure (SCM), and polycrystalline structures (PCM) were observed under
    the specific scan-ning condition in near β-Ti alloys.\r\nThe creep deformation
    mechanism is dislocation creep, which depends on the microstruc-ture in the molten
    pool rather than the grain size in both alloys. Even so, grain size depend-ence
    of creep life was observed in near α-Ti alloy. In near β-Ti alloy, there is no
    significant difference in creep deformation between SCM, CLM, and PCM. The creep
    strain was larger at low stress in the LPBFed samples compared with the forged
    sample, but the creep life was slightly longer in the LPBFed samples than in the
    forged sample."
  description_type: abstract
  lang: eng

## Creator

- name: Y. Yamabe-Mitarai
  role: author
  organization: Department of Advanced Material Science, Graduate School of Frontier
    Sciences, The University of Tokyo
- name: Y. 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: T. Matsunaga
  role: author
  organization: JAXA
- name: R. Ozasa
  role: author
  organization: Graduate School of Engineering, Osaka University
- name: T. Ishimoto
  role: author
  organization: University of Toyama
- name: T. Ito
  role: author
  organization: Toyama Prefectural University
- name: T. Nakano
  role: author
  organization: Graduate School of Engineering, Osaka University

## Contact agent



## Publisher



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## Keyword

- subject: Additive manufacturing
  schema: not_defined
- subject: Crystallographic analysis
  schema: not_defined
- subject: Heat-resistant titanium alloys
  schema: not_defined
- subject: Microstructure
  schema: not_defined
- subject: Precipitation
  schema: not_defined
- subject: Volumetric energy density
  schema: not_defined
- subject: Melting pool boundary
  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



## Funding

- identifier: JP21H05198
  funder_name: JSPS
  description: Science for Super-Titanium Creation in Super Thermal Field

## Instrument



## Instrument operator



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## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



## Specific property for specimen



## Process for specimen treatment



## Computational method



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## Fileset

- id: 3f8eca09-fa92-419d-9411-6d9a3fa8fb89
  filename: 20251203PRICM12_Abstract_template_Mitarai.pdf
  content_type: application/pdf
  size: 71759
  md5: e5ea13dbace83b069a36a9e3a6677733

## Thumbnail

fileset_id: 3f8eca09-fa92-419d-9411-6d9a3fa8fb89
filename: 20251203PRICM12_Abstract_template_Mitarai.pdf