# Effects of Laser Peening on Rotating Bending Fatigue Strength of Additive Manufactured Maraging Steel in Very High Cycle Fatigue Regime

https://mdr.nims.go.jp/datasets/b5695b60-ca5e-4141-a315-ef731a6acc99

## File

- [3Dマルエージング鋼_横国.pdf](https://mdr.nims.go.jp/filesets/ed4bf1d3-b11c-4ac1-90e8-f8f68515fb75/download) ([Detail](https://mdr.nims.go.jp/filesets/ed4bf1d3-b11c-4ac1-90e8-f8f68515fb75.md))

## Id

b5695b60-ca5e-4141-a315-ef731a6acc99

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-01-08T05:31:15.808938Z

## Updated at

2025-01-08T07:31:16.168942Z

## Published at

2025-01-20T03:30:50.701934Z

## Doi



## First published url

https://doi.org/10.2355/tetsutohagane.tetsu-2024-081

## Date published

2025-01-01

## Recorded date published

2025

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Effects of Laser Peening on Rotating Bending Fatigue Strength of Additive
    Manufactured Maraging Steel in Very High Cycle Fatigue Regime
  title_type: original
  lang: en

## Description

- description: Additive manufacturing technology is garnering attention as a novel
    approach for the fabrication of components with complex shapes. Nevertheless,
    the low fatigue strength of the additive manufactured metals represents a significant
    challenge. In this study, rotating bending fatigue tests were conducted on additive
    manufactured maraging steel up to a very high cycle fatigue (VHCF) range (10^8
    cycles). The effects of laser peening (LP) on fatigue strength were investigated.
    LP introduced compressive residual stress near the surface, while tensile residual
    stress was generated inside. The fracture initiation point of the non-LP specimen
    was observed to be the surface in the low-cycle range and the interior in the
    VHCF range. In contrast, all specimens subjected to laser peening fractured from
    the interior. LP was found to be effective in improving fatigue strength in the
    low-cycle range, but it was also observed to reduce fatigue strength in the VHCF
    range. The effect of LP on VHCF strength was discussed by focusing on the stress
    acting at the fracture initiation point. Furthermore, the distribution of defect
    size on polished and fractured surfaces of the specimens was evaluated by extreme
    value statistics. The results demonstrated that these values were approximately
    the same. Therefore, the evaluation method based on extreme value statistics can
    predict the size of defects in a larger volume member.
  description_type: abstract
  lang: und

## Creator

- name: Genya Nakamura
  role: author
- name: Akihiko Iwasaka
  role: author
- name: Yoshiyuki Furuya
  role: author
  orcid: https://orcid.org/0000-0002-3039-5280
- name: Koji Takahashi
  role: author
  orcid: https://orcid.org/0000-0001-5971-0582

## Contact agent



## Publisher

organization: Iron and Steel Institute of Japan

## Managing organization



## Keyword

- subject: fatigue strength
  schema: not_defined
- subject: additive manufacturing
  schema: not_defined
- subject: maraging steel
  schema: not_defined
- subject: laser peening
  schema: not_defined
- subject: very high cycle fatigue
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin



## Embargo



## Journal

- title: Tetsu-to-Hagane
  issn: '00211575'
  volume: '111'
  issue: '1'
  article_number: TETSU-2024-081

## Conference



## Related item



## Funding

- identifier: 23K22627
  funder_name: JSPS

## 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



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## Fileset

- id: ed4bf1d3-b11c-4ac1-90e8-f8f68515fb75
  filename: 3Dマルエージング鋼_横国.pdf
  content_type: application/pdf
  size: 5333575
  md5: 04fa11e3241e113d0221729e93d57172

## Thumbnail

fileset_id: ed4bf1d3-b11c-4ac1-90e8-f8f68515fb75
filename: 3Dマルエージング鋼_横国.pdf