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Monitoring of the friction stir welding process to describe parameter effects on joint quality

: Jene, T.; Dobmann, G.; Wagner, G.; Eifler, D.

Fulltext urn:nbn:de:0011-n-1015535 (8.3 MByte PDF)
MD5 Fingerprint: 41caf931079aad761fb7dca3d7d5e13b
Created on: 9.7.2010

Welding in the world 52 (2008), No.9/10, pp.IIW DOC III-1430-07
ISSN: 0043-2288
ISSN: 1878-6669
International Institute of Welding (International Congress) <6, 2008, Tianjin>
Journal Article, Conference Paper, Electronic Publication
Fraunhofer IZFP ()
aluminium alloy; defect; friction stir welding; friction welding; light metal; microstructure

With the industrial use of FSW growing steadily, non-destructive testing methods that can detect the impending formation of flaws during welding must be developed. The present work accomplished two goals. First, the distribution of oxide fragments within aluminium welds could be correlated with certain welding process variables. Consequently, an approach was suggested to prevent the conglomeration of oxide fragments in the weld by reducing the surface roughness of the abutted edges. Second, welding forces can be used to predict the formation of elongated cavities inside the weld. This project showed that by monitoring the welding forces, the ability to change the welding variables in real time could prevent the formation of flaws in friction stir welds.