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Microstructure and tensile properties of friction welded aluminum alloy AA7075-T6

✍ Scribed by H. Khalid Rafi; G.D. Janaki Ram; G. Phanikumar; K. Prasad Rao

Publisher: Elsevier Science
Year: 2010
Weight: 722 KB
Volume: 31
Category: Article
ISSN: 0261-3069
DOI: 10.1016/j.matdes.2009.11.065

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✦ Synopsis

Solid-state welding processes like friction welding and friction stir welding are now being actively considered for welding aluminum alloy AA7075. In this work, friction welding of AA7075-T6 rods of 13mm diameter was investigated with an aim to understand the effects of process parameters on weld microstructure and tensile properties. Welds made with various process parameter combinations (incorporating Taguchi methods) were subjected to tensile tests. Microstructural studies and hardness tests were also conducted. The results show that sound joints in AA7075-T6 can be achieved using friction welding, with a joint efficiency of 89% in as-welded condition with careful selection of process parameters. The effects of process parameters are discussed in detail based on microstructural observations.

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