# Detection and location of microdefects during selective laser melting by wireless acoustic emission measurement

https://mdr.nims.go.jp/datasets/21f5cea7-a86d-4621-8447-9d0b75416e72

## File

- [Detection_and_location_of_microdefects_during_selective_laser_melting_by_wireless_acoustic_emission_measurement.pdf](https://mdr.nims.go.jp/filesets/f2f368c4-f67f-460e-9dc4-f84b1cd07943/download) ([Detail](https://mdr.nims.go.jp/filesets/f2f368c4-f67f-460e-9dc4-f84b1cd07943.md))

## Id

21f5cea7-a86d-4621-8447-9d0b75416e72

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2023-04-07T14:43:56.523699Z

## Updated at

2024-01-05T13:11:37.434999Z

## Published at

2023-04-24T06:08:17.987206Z

## Doi



## First published url

https://doi.org/10.1016/j.addma.2021.101915

## Date published

2021-02-18

## Recorded date published

2021-4

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Detection and location of microdefects during selective laser melting by
    wireless acoustic emission measurement
  title_type: original
  lang: en

## Description

- description: Microdefects sometimes form in workpieces fabricated by selective laser
    melting (SLM). It is difficult to understand the mechanism of generation of microdefects
    because the occurrence time during processing cannot be easily identified by conventional
    monitoring methods. We have therefore developed a convenient method for real-time
    monitoring of microdefects generation during SLM by using proprietary battery-powered
    equipment capable of continuous recording and wireless transmission of acoustic
    emission (AE) waveforms. To clarify the detection capabilities of the proposed
    method and to evaluate the factors that cause microcrack generation, AE monitoring
    was conducted for single-layer modeling tests with single-track or multi-track.
    We could successfully detect AE signals during the tests. The times of occurrence
    and locations of AE events were identified, and the results were compared with
    observations of the specimen cross-sections by the X-ray computed tomography (CT).
    At first in single-track tests, burst type AE events were detected during processing
    and their origin was confirmed to be pores and microcracks in the specimen. Then
    in multi-track tests, defects slightly after laser irradiation and defects due
    to the turning back of the irradiation were detected. The effectiveness and potential
    of our novel AE monitoring technique for the SLM process have been demonstrated.
  description_type: abstract
  lang: eng

## Creator

- name: ITO, Kaita
  role: author
  orcid: https://orcid.org/0000-0002-1438-6982
  organization: National Institute for Materials Science
  department: Research and Services Division of Materials Data and Integrated System/Data-driven
    Structural Materials  Group
  ror: https://ror.org/026v1ze26
- name: KUSANO, Masahiro
  role: author
  orcid: https://orcid.org/0000-0002-5061-0195
  organization: National Institute for Materials Science
  department: Research Center for Structural Materials/Bonding and Manufacturing Field/Integrated
    Smart Materials Group
  ror: https://ror.org/026v1ze26
- name: DEMURA, Masahiko
  role: author
  orcid: https://orcid.org/0000-0002-7308-3041
  organization: National Institute for Materials Science
  department: Research and Services Division of Materials Data and Integrated System
  ror: https://ror.org/026v1ze26
- name: WATANABE, Makoto
  role: author
  orcid: https://orcid.org/0000-0002-5064-9583
  organization: National Institute for Materials Science
  department: Research Center for Structural Materials/Bonding and Manufacturing Field
  ror: https://ror.org/026v1ze26

## Contact agent



## Publisher

organization: Elsevier

## Managing organization



## Keyword

- subject: Selective laser melting
  schema: not_defined
- subject: Crack detection
  schema: not_defined
- subject: Acoustic emission
  schema: not_defined
- subject: Wireless monitoring
  schema: not_defined
- subject: Real-time monitoring
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Additive Manufacturing
  issn: '22148604'
  volume: '40'
  start_page: 101915
  end_page: 101915

## Conference



## Related item



## Funding

- funder_name: JST
  description: 本研究は，内閣府総合科学技術・イノベーション会議の戦略的イノベーション創造プログラム（SIP)「統合型材料開発システムによるマテリアル革命」（管理法人：JST）によって実施されました。

## 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



## Software



## Custom property



## Fileset

- id: f2f368c4-f67f-460e-9dc4-f84b1cd07943
  filename: Detection_and_location_of_microdefects_during_selective_laser_melting_by_wireless_acoustic_emission_measurement.pdf
  content_type: application/pdf
  size: 9173581
  md5: 9393b0ab13da75e4ed8cb8f2db5d391b

## Thumbnail

fileset_id: f2f368c4-f67f-460e-9dc4-f84b1cd07943
filename: Detection_and_location_of_microdefects_during_selective_laser_melting_by_wireless_acoustic_emission_measurement.pdf