Friction stir welding has several benefits in welding difficult to weld aluminium alloys and dissimilar materials. However, the friction stir welding process requires careful selection of welding parameters, mainly tool rotation speed and travel speed as well as tool geometry, in order to prevent defect formation. The aim of this investigation is to study the effect of friction stir welding parameters on the microstructure and mechanical properties of welds in two automotive aluminium alloys. Welds were made in 1 mm thick sheets of Al 5182-H111 and Al 6016-T4 alloys. The welding process was carried out in both materials, in two series, using in each series different tool design and welding parameters. The welding parameters were selected in order to give colder welds in the second series than in the first series. Both welding process parameters gave welds with good appearance and free from defects. The central zone of the welds, commonly designated as the nugget, is formed of small equiaxed grains, though these grams are difficult to distinguish in some welds. No substantial change was observed in the hardness of the welds of the first series as opposed to the welds of the second series in both materials. The change in the process parameters influenced the weld efficiency too.
Friction stir welding of automotive aluminium alloys
Technical, Economic and Ecological Aspects, International Conference Welding and Materials, 2007 ; 433-439
Welding in the World ; 51 , Sh Tg
2007
7 Seiten, 4 Bilder, 4 Tabellen, 7 Quellen
Conference paper
English
Friction Stir Welding of Aluminium-Alloys
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