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Abstract
Friction Stir Welding (FSW) is an advance joining process for different similar and dissimilar materials. It is commonly used for joining of Aluminum alloys. However it is necessary to overcome some challenges for its wide-spread uses. Tool design and the selection of process parameters are critical issues in the usage of this process. This study focuses on the process parameters that is required for producing effective friction stir welding of two similar aluminum alloys (AA6101T6 to AA6101T6) and dissimilar Aluminum alloys (AA6101T6 alloy to AA6351T6) . Three different tool diameters such as 20 mm, 25 mm and 30 mm with three different tool rotational speeds such as 600 rpm, 800 rpm and 1200 rpm have been used to weld the joints. The welded samples were tested for mechanical properties as well as microstructure. It was observed that 30 mm tool gives better weld quality for friction stir welding of similar aluminum alloy but 25 mm tool with 1200 rpm rotational speed gave satisfactory weld quality for friction stir welding of dissimilar aluminum alloys. It is one of the important welding process that can adopted for welding of aluminum alloys with excellent mechanical properties. The results were confirmed by further experiments.
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