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Characterization of cold lap defects in tandem arc MAG welding
University West, Department of Engineering Science, Division of Mechanical Engineering. (PTW)
University West, Department of Engineering Science, Division of Mechanical Engineering. (PTW)ORCID iD: 0000-0003-2560-0531
University West, Department of Engineering Science, Division of Production Engineering. (PTW)ORCID iD: 0000-0001-7787-5444
University West, Department of Engineering Science, Division of Production Engineering. (PTW)ORCID iD: 0000-0002-9578-4076
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2013 (English)In: Rivista Italiana della Saldatura, ISSN 0035-6794, Vol. 65, no 5, p. 761-769Article in journal (Refereed) Published
Abstract [en]

The objective of this investigation was to classify and characterize the small lack of fusion defects, called cold lap, located at the weld toe. Since the defects are very small (0.01-1.5 mm) and difficult to detect by NDT methods, a better understanding of the formation mechanism is required to be able to avoid their formation. The investigation consisted of two parts. Firstly, a study was made on the type and frequency of cold laps. Three types were identified, namely "spatter cold lap", and "overlap cold lap" and "spatter-overlap cold lap". No relation between type or frequency of cold laps and the welding parameters could be established. Secondly, the interface between spatter and the base material was investigated using optical and scanning electron microscopy, to better understand the cold lap formation mechanism. Manganese-silicate particles were found in the interface located in such a way that they may assist cold lap formation.

Place, publisher, year, edition, pages
Istituto Italiano della Saldatura , 2013. Vol. 65, no 5, p. 761-769
Keywords [en]
Work-integrated Learning, WIL
Keywords [sv]
AIL
National Category
Manufacturing, Surface and Joining Technology
Research subject
ENGINEERING, Manufacturing and materials engineering; Work Integrated Learning
Identifiers
URN: urn:nbn:se:hv:diva-5768Scopus ID: 2-s2.0-84887474468OAI: oai:DiVA.org:hv-5768DiVA, id: diva2:668402
Available from: 2013-11-29 Created: 2013-11-28 Last updated: 2018-08-09Bibliographically approved

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Svensson, Lars-ErikNylén, PerMarkocsan, Nicolaie

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