Microstructures and Mechanical Properties of Friction Stir Spot Welded Aluminum Alloy AA2014

Friction stir spot welding (FSSW) is a relatively recent development, which can provide a superior alternative to resistance spot welding and riveting for fabrication of aluminum sheet metal structures. In the current work, FSSW experiments were conducted in 3-mm thick sheets of aluminum alloy 2014...

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Bibliographic Details
Published in:Journal of materials engineering and performance 2013-01, Vol.22 (1), p.71-84
Main Authors: Babu, S., Sankar, V. S., Janaki Ram, G. D., Venkitakrishnan, P. V., Madhusudhan Reddy, G., Prasad Rao, K.
Format: Article
Language:English
Subjects:
Applied sciences
Characterization and Evaluation of Materials
Chemistry and Materials Science
Corrosion and Coatings
Engineering Design
Exact sciences and technology
Joining, thermal cutting: metallurgical aspects
Materials Science
Metals. Metallurgy
Quality Control
Reliability
Safety and Risk
Tribology
Welding
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Summary:Friction stir spot welding (FSSW) is a relatively recent development, which can provide a superior alternative to resistance spot welding and riveting for fabrication of aluminum sheet metal structures. In the current work, FSSW experiments were conducted in 3-mm thick sheets of aluminum alloy 2014 in T4 and T6 conditions, with and without Alclad layers. The effects of tool geometry and welding process parameters on joint formation were investigated. A good correlation between process parameters, bond width, hook height, joint strength, and fracture mode was observed. The presence of Alclad layers and the base metal temper condition were found to have no major effect on joint formation and joint strength. Friction stir spot welds produced under optimum conditions were found to be superior to riveted joints in lap-shear and cross-tension tests. The prospects of FSSW in aluminum sheet metal fabrication are discussed.
ISSN:1059-9495
1544-1024
DOI:10.1007/s11665-012-0218-z