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Experimental study on cold lap formation in tandem gas metal arc welding
University West, Department of Engineering Science, Division of Production Engineering.
2011 (English)Licentiate thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Göteborg: Chalmers , 2011. , p. 87
Series
Technical report / Department of Materials and Manufacturing Technology, Chalmers University of Technology, ISSN 1652-8891 ; 69/2011
Keywords [en]
GMAW, Cold lap, oxide, Tandem arc welding
National Category
Manufacturing, Surface and Joining Technology
Research subject
ENGINEERING, Manufacturing and materials engineering
Identifiers
URN: urn:nbn:se:hv:diva-3828OAI: oai:DiVA.org:hv-3828DiVA, id: diva2:452623
Presentation
2011-09-09, Lecture Room MB, Chalmers University of Technology, Göteborg, 10:00 (English)
Opponent
Supervisors
Projects
KOST/LOST project and WIQ projectAvailable from: 2011-10-31 Created: 2011-10-31 Last updated: 2011-10-31Bibliographically approved
List of papers
1. Characterization of Cold Lap Defects in Tandem Arc MAG Welding
Open this publication in new window or tab >>Characterization of Cold Lap Defects in Tandem Arc MAG Welding
2010 (English)In: Proceedings of the International Conference on Advances in Welding Science & Technology for Construction, Energy & Transportation AWST-2010: Istanbul, Turkey, 12-15 July, 2010, 2010, p. 303-311Conference paper, Published paper (Refereed)
National Category
Manufacturing, Surface and Joining Technology
Research subject
ENGINEERING, Manufacturing and materials engineering
Identifiers
urn:nbn:se:hv:diva-3116 (URN)978-605-61419-1-1 (ISBN)
Conference
International Conference on Advances in Welding Science & Technology for Construction, Energy & Transportation AWST-2010
Available from: 2011-01-27 Created: 2011-01-27 Last updated: 2016-02-11Bibliographically approved
2. Factors influencing fusion on spatter to the base metal during tandem GMAW welding
Open this publication in new window or tab >>Factors influencing fusion on spatter to the base metal during tandem GMAW welding
(English)Article in journal (Refereed) Submitted
National Category
Manufacturing, Surface and Joining Technology
Research subject
ENGINEERING, Manufacturing and materials engineering
Identifiers
urn:nbn:se:hv:diva-3827 (URN)
Available from: 2011-10-31 Created: 2011-10-31 Last updated: 2014-09-15Bibliographically approved
3. Influence of oxides on cold lap formation in tandem GMAW
Open this publication in new window or tab >>Influence of oxides on cold lap formation in tandem GMAW
2012 (English)In: Science and technology of welding and joining, ISSN 1362-1718, E-ISSN 1743-2936, ISSN 1362-1718, Vol. 17, no 8, p. 643-648Article in journal (Refereed) Published
Abstract [en]

The connection between the formation of cold laps and the presence of Mn‐Si oxides was studied. The underlying purpose is to understand the fundamental mechanisms of cold lap formation and to avoid it. Tandem gas metal arc welding (GMAW) was used to produce welded specimens in two different shielding gases (pure Ar and pure CO2) with base metal S355 MC (EN-10149-2) and wire G3Si1 (EN ISO 14341-A). Cross-sections of welds in the cold lap location were evaluated by light optical microscopy and scanning electron microscopy combined with energy dispersive spectroscopy. The results showed that the Mn‐Si oxides significantly enhanced cold laps formation, especially the overlap type cold lap formation. The Mn‐Si oxides originated from oxidation of the droplets. These oxides transfers to the surface of the weld pool at the weld toe, where they contributed to the formation of the cold laps.

National Category
Manufacturing, Surface and Joining Technology
Research subject
ENGINEERING, Manufacturing and materials engineering
Identifiers
urn:nbn:se:hv:diva-3826 (URN)10.1179/1362171812Y.0000000057 (DOI)000309661300006 ()2-s2.0-84867507729 (Scopus ID)
Available from: 2011-10-31 Created: 2011-10-31 Last updated: 2017-12-08Bibliographically approved

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Citation style
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