Application of a novel friction stir spot welding process on dissimilar aluminum joints. (October 2018)

• Record Type: Journal Article
• Authors: Ibrahim, Isam Jabbar; Yapici, Guney Guven
• Is Part Of: Journal of manufacturing processes. Volume 35(2018)
• Page Start: 282
• Page End: 288
• Publication Date: 2018-10
• Subjects: Friction stir spot welding -- Dissimilar joining -- Keyhole -- Lap shear strength -- Refill -- Aluminum; Production management -- Data processing -- Periodicals; Manufacturing processes -- Periodicals; Procestechnologie; Productietechniek; Production -- Gestion -- Informatique -- Périodiques; Fabrication -- Périodiques; Manufacturing processes; Production management -- Data processing; Periodicals; 670.5
• DOI: 10.1016/j.jmapro.2018.08.018
• Languages: English
• ISSNs: 1526-6125

Abstract

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.