Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
The significance of supplementary shielding in WAAM of aluminium thin walls
Federal University of Uberlandia, Center for Research and Development of Welding Processes, Uberlandia (BRA).
Federal University of Uberlandia, Center for Research and Development of Welding Processes, Uberlandia (BRA).
University West, Department of Engineering Science, Division of Welding Technology. Federal University of Uberlandia, Center for Research and Development of Welding Processes, Uberlandia (BRA). (KAMPT)ORCID iD: 0000-0002-1005-5895
Linde GmbH, Linde Technologies, Department of Arc Technologies, Unterschleißheim (DEU).
Show others and affiliations
2023 (English)In: Journal of Manufacturing Processes, ISSN 1526-6125, Vol. 106, p. 520-536Article in journal (Refereed) Published
Abstract [en]

WAAM (wire arc additive manufacturing) of aluminium requires special operational care to avoid problems such as instabilities, contamination or porosities. This work aims at verifying whether supplementary shielding gas can affect the WAAM performance when building Al alloy thin walls, in terms of metal transfer, porosity, superficial finishing, and geometrical and metallurgical features. Thin walls were manufactured with and without supplementary shielding (ultra-pure Ar). A dedicated nozzle was designed in-house to provide additional protection against the reaction with surrounding atmospheric gases. Pure Ar and two Ar-based commercial shielding gases with different additives were employed to make the conclusions more sustainable. It was possible to conclude that supplementary shielding leads to better metal transfer regularity, cleaner lateral and surface, a shinier top layer appearance, and a slight trend to higher microhardness. On the other hand, it does not affect porosity after layer depositions, wall geometry (the total and effective layer width, layer height, and surface waviness of the walls), and microstructures. Finally, regarding the performance of shielding gases, there is no evidence of any effect from the supplementary shielding, since this approach improved the process operationality with the three different shielding gases but did not change their individual tendencies. 

Place, publisher, year, edition, pages
2023. Vol. 106, p. 520-536
Keywords [en]
WAAM, Aluminium alloy, Thin wall, Supplementary shielding gas, Soot, Metal transfer, Dimension control
National Category
Manufacturing, Surface and Joining Technology
Research subject
Production Technology
Identifiers
URN: urn:nbn:se:hv:diva-20889DOI: 10.1016/j.jmapro.2023.09.063ISI: 001105311100001Scopus ID: 2-s2.0-85174027123OAI: oai:DiVA.org:hv-20889DiVA, id: diva2:1822843
Note

CC BY 4.0

Available from: 2023-12-28 Created: 2023-12-28 Last updated: 2023-12-28

Open Access in DiVA

fulltext(19819 kB)74 downloads
File information
File name FULLTEXT01.pdfFile size 19819 kBChecksum SHA-512
4754d012428fc872ee6cf677ae7f35a564514d97f2a7fe0311bdac257dda8178b5c6e60e967396c5a9d82869b6a5b5bed46d1836efa8596102f152e7fba46e8b
Type fulltextMimetype application/pdf

Other links

Publisher's full textScopus

Authority records

Scotti, Americo

Search in DiVA

By author/editor
Scotti, Americo
By organisation
Division of Welding Technology
Manufacturing, Surface and Joining Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 75 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 189 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf