Application of a novel friction stir spot welding process on dissimilar aluminum joints
Type :
Article
Publication Status :
Published
Access :
restrictedAccess
Abstract
Intermediate layer friction stir spot welding (IL-FSSW) is introduced in this study as a novel spot welding technique to eliminate the keyhole associated with the conventional friction stir spot welding (FSSW). This process is utilized for fabricating a joint of 6061-T6 and 2024-T3 aluminum alloys. The welding process is based on preventing the keyhole occurrence owing to the addition of an intermediate layer (IL), rendering additional post-treatments unnecessary. Results indicated a decent joint appearance without a keyhole along with improved mechanical performance yielding a lap shear force over 4.5 kN. The microstructure of the weld cross-section indicated that the IL contributed to the nugget zone and revealed its influence on the formation of a hooked structure. The fracture surface showed ductile features within the IL boundary, whereas mixed failure was prevalent outside it.
Source :
Journal of Manufacturing Processes
Date :
2018-10
Volume :
35
Publisher :
Elsevier
URI
http://hdl.handle.net/10679/6197https://www.sciencedirect.com/science/article/abs/pii/S1526612518304213
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