# Acoustic emission monitoring reveals keyhole formation and evolution

https://mdr.nims.go.jp/datasets/fbb87401-9765-4610-9b54-556d05e69684

## File

- [s41598-025-27232-1.pdf](https://mdr.nims.go.jp/filesets/ed8d6110-2132-422c-92a2-90a320457879/download) ([Detail](https://mdr.nims.go.jp/filesets/ed8d6110-2132-422c-92a2-90a320457879.md))

## Id

fbb87401-9765-4610-9b54-556d05e69684

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-12-09T04:02:53.582438Z

## Updated at

2025-12-09T23:30:07.505757Z

## Published at

2025-12-09T23:23:55.067902Z

## Doi



## First published url

https://doi.org/10.1038/s41598-025-27232-1

## Date published

2025-12-05

## Recorded date published



## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Acoustic emission monitoring reveals keyhole formation and evolution
  title_type: original
  lang: en

## Description

- description: "We present results from airborne acoustic emission (AE) monitoring
    during the Laser Powder Bed Fusion (LPBF) process. A distinct acoustic signature
    was consistently observed alongside keyhole formation and plume instability, with
    its frequency inversely proportional to the depth of the melt pool. The effects
    of laser scanning speed, laser power, material (Ti-6Al-4V, S316L, Inconel625),
    and laser spot size on AE signals were systematically investigated. A resurgence
    of high-frequency components for deep melt pools was found to coincide with the
    onset of keyhole-induced porosity. This acoustic signature is attributed to fluctuations
    at the liquid–vapor interface, which drive oscillations in the vaporization plume.
    Multi-track experiments further demonstrated the potential of AE monitoring for
    real-time fault detection and closed-loop process control in LPBF.\r\n"
  description_type: abstract
  lang: und

## Creator

- name: Louis Galiègue
  role: author
- name: Fabien Briffod
  role: author
  orcid: https://orcid.org/0000-0002-3635-4885
- name: Kaita Ito
  role: author
  orcid: https://orcid.org/0000-0002-1438-6982
- name: Hiroshige Masuo
  role: author
- name: Makoto Watanabe
  role: author
  orcid: https://orcid.org/0000-0002-5064-9583
- name: Takayuki Shiraiwa
  role: author
- name: Manabu Enoki
  role: author

## Contact agent



## Publisher

organization: Springer Science and Business Media LLC

## Managing organization



## Keyword

- subject: Acoustic emission
  schema: not_defined
- subject: Additive manufacturing
  schema: not_defined
- subject: Keyhole
  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: Scientific Reports
  issn: '20452322'
  volume: '15'
  issue: '1'
  article_number: '43243'

## Conference



## Related item



## Funding

- funder_name: Council for Science, Technology and Innovation
- funder_name: Cross-ministerial Strategic Innovation Promotion Program
- funder_name: Japan Science and Technology Agency
- identifier: KAKENHI 24H00982
  funder_name: Japan Society for the Promotion of Science

## 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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## Custom property



## Fileset

- id: ed8d6110-2132-422c-92a2-90a320457879
  filename: s41598-025-27232-1.pdf
  content_type: application/pdf
  size: 3886696
  md5: 65c278a452bd6ad07414d6ef16f5ad97

## Thumbnail

fileset_id: ed8d6110-2132-422c-92a2-90a320457879
filename: s41598-025-27232-1.pdf