# Fe-15Mn-10Cr-8Ni-4Si bidirectional-TRIP鋼の極低サイクル疲労に及ぼすひずみ速度の影響

https://mdr.nims.go.jp/datasets/c99af32b-0dd1-4831-844d-98d66f11e74a

## File

- [72_858.pdf](https://mdr.nims.go.jp/filesets/1a8260d4-e004-4753-835e-7d038105efcb/download) ([Detail](https://mdr.nims.go.jp/filesets/1a8260d4-e004-4753-835e-7d038105efcb.md))

## Id

c99af32b-0dd1-4831-844d-98d66f11e74a

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-08-19T22:31:38.898865Z

## Updated at

2024-09-30T07:30:40.184546Z

## Published at

2024-09-30T07:30:40.253087Z

## Doi



## First published url

https://doi.org/10.2472/jsms.72.858

## Date published

2023-12-15

## Recorded date published

2023

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Fe-15Mn-10Cr-8Ni-4Si bidirectional-TRIP鋼の極低サイクル疲労に及ぼすひずみ速度の影響
  title_type: original
  lang: ja

## Description

- description: Extremely low-cycle fatigue tests were conducted on the Fe-15Mn-10Cr-8Ni-4Si
    bidirectional-TRIP (B-TRIP) steel, up to an axial total strain amplitude of 10%.
    The fatigue life was about five times longer than that of SUS316 in the range
    of total strain amplitude of 4% or more. The improved fatigue life of the Fe-15Mn-10Cr-8Ni-4Si
    was attributed to the reversible bidirectional γ↔ε transformation during fatigue
    deformation that might mitigate the fatigue damage. On the other hand, the fatigue
    life tended to decrease with increasing strain rate when the strain rate was varied
    from 0.1 to 2.5%/s with the total strain amplitude of 10%. The fractography revealed
    that the fracture surface varied significantly with strain rate. At low strain
    rates, the crystallographic fracture surface characterized by facets and secondary
    cracks were observed, whereas these features were not observed at high strain
    rates. EBSD measurements on the postmortem microstructure showed that frequent
    ε-martensite formation occurred at low strain rates, whereas martensitic transformation
    was suppressed at high strain rates. The change in the specimen surface temperature
    was evaluated in terms of the Gibbs free energy difference between γ-austenite
    and ε-martensite ΔGγ→ε, and the effect of strain rate on the extremely low-cycle
    fatigue was discussed from the viewpoint of the deformation mechanism as follows.
    At low strain rate, ΔGγ→ε ≲ 0 (negative close-to-zero ΔGγ→ε), the condition for
    B-TRIP to work effectively, is maintained over the entire life span. At high strain
    rate, the deformation mechanism changes to one in which γ-austenite is dominant
    due to the increase in ΔGγ→ε caused by self-heating; the fatigue damage mitigation
    mechanism by B-TRIP is less likely to occur at high strain rates, resulting in
    a reduction in life.
  description_type: abstract
  lang: und

## Creator

- name: 吉中 奎貴
  role: author
  orcid: https://orcid.org/0000-0003-0534-7815
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: 長島 伸夫
  role: author
  orcid: https://orcid.org/0000-0003-3588-980X
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: 澤口 孝宏
  role: author
  orcid: https://orcid.org/0000-0002-9405-002X
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26

## Contact agent



## Publisher

organization: 公益社団法人 日本材料学会

## Managing organization



## Keyword

- subject: Fatigue
  schema: not_defined
- subject: Fracture surface
  schema: not_defined
- subject: Extremely low cycle fatigue
  schema: not_defined
- subject: Microstructure
  schema: not_defined
- subject: Martensitic transformation
  schema: not_defined
- subject: Seismic damper
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: 材料
  volume: '72'
  issue: '12'
  start_page: 858
  end_page: 865

## Conference



## Related item



## Funding

- identifier: 23K13227
  funder_name: JSPS
  description: 可逆双方向TRIPを活用した疲労き裂制御による耐疲労合金創製
- identifier: 20K04170
  funder_name: JSPS
  description: 大地震を模擬した高速ひずみ速度の極低サイクル繰り返し変形による疲労損傷の解明
- identifier: 19K14853
  funder_name: JSPS
  description: 疲労損傷のマルチスケール的観察が結びつける転位-塑性変形-き裂関係

## 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



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## Fileset

- id: 1a8260d4-e004-4753-835e-7d038105efcb
  filename: 72_858.pdf
  content_type: application/pdf
  size: 105059309
  md5: 12e566c4c634e5e065dea1ced7852464

## Thumbnail

fileset_id: 1a8260d4-e004-4753-835e-7d038105efcb
filename: 72_858.pdf