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In this paper the structure and mechanical properties of similar AA5083-FSW joints were investigated, as well as the effects of post-weld cold-rolling of FSW joints. Two joints were formed using different welding parameters, in order to investigate the influence of parameters on joint properties. The welded joints were tested using non-destructive methods (visual and X-ray inspection, electrical conductivity variation) and destructive methods (tensile and hardness testing, metallographic analysis of macro- and microstructure). The joints were also cold-rolled. It was found that the joint welded using parameters Vrot/Vtr = 750/73 rpm/mm can be successfully processed by cold rolling; it also has better mechanical properties than the joint welded using parameters Vrot/Vtr = 750/150 rpm/mm, and had a more uniform hardness distribution. It was concluded that using parameters 750/73 results in a AA5083 weld of satisfactory quality was obtained.

Influence of welding parameters on joint properties and possibility of post-weld cold-rolling of Friction stir welded aluminum alloy 5083