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
Filler metal distribution and processing stability in laser-arc hybrid welding of thick HSLA steel
SINTEF Industry, Norway.
SINTEF Industry, Norway.
SINTEF Industry, Norway.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Product and Production Development.ORCID iD: 0000-0003-4265-1541
Show others and affiliations
2020 (English)In: Journal of Manufacturing Processes, ISSN 1526-6125, Vol. 54, p. 228-239Article in journal (Refereed) Published
Abstract [en]

Welds made by high power laser beam have deep and narrow geometry. Addition of filler wire by the arc source, forming the laser-arc hybrid welding (LAHW) process, is very important to obtain required mechanical properties. Distribution of molten wire throughout the entire weld depth is of concern since it tends to have low transportation ability to the root. Accurate identification of filler metal distribution is very challenging. Metal-cored wires can provide high density of non-metallic inclusions (NMIs) which are important for acicular ferrite nucleation. Accurate filler distribution can be recognized based on statistical characterization of NMIs in the weld. In the present study, it was found that the amount of filler metal decreased linearly towards the root. The filler metal tends to accumulate in the upper part of the weld and has a steep decrease at 45–55 % depth which also has wavy pattern based on longitudinal cuts. Substantial hardness variation in longitudinal direction was observed, where in the root values can reach > 300 HV. Excessive porosity was generated at 75 % depth due to unstable and turbulent melt flow based on morphology of prior austenite grains. The delicate balance of process parameters is important factor for both process stability and filler metal distribution.

Place, publisher, year, edition, pages
Elsevier, 2020. Vol. 54, p. 228-239
Keywords [en]
Laser-arc hybrid welding, High strength steel, Thick steel, Non-metallic inclusions, Filler metal distribution, Microstructure, Mechanical properties
National Category
Manufacturing, Surface and Joining Technology
Research subject
Manufacturing Systems Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-78209DOI: 10.1016/j.jmapro.2020.02.048Scopus ID: 2-s2.0-85081159978OAI: oai:DiVA.org:ltu-78209DiVA, id: diva2:1416802
Note

Validerad;2020;Nivå 2;2020-03-25 (alebob)

Available from: 2020-03-25 Created: 2020-03-25 Last updated: 2020-03-25Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textScopus

Authority records BETA

Frostevarg, JanKaplan, Alexander F.H.

Search in DiVA

By author/editor
Frostevarg, JanKaplan, Alexander F.H.
By organisation
Product and Production Development
Manufacturing, Surface and Joining Technology

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 16 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