Impact behaviour of dissimilar AA2024-T351/7075-T651 FSWed butt-joints: effects of Al2O3-SiC particles addition

Dissimilar friction stir welding joints are widely employed in the industrial field due to excellent microstructural and mechanical properties of resulting joints. Nevertheless, further enhance weld properties, addition reinforcement particles on joint-line during process has been proven effective for increasing its performance. In present investigation, microstructure impact behaviour FSWed between AA2024-T351 AA7075-T651 aluminium plates were investigated, considering effect different parameters selected through a full factorial 2k design experiments: both rotational translational speed tool, as well Al2O3-SiC microparticles, considered input parameters. Unnotched 10 x 5 55 mm specimens tested an instrumented 50 J Charpy pendulum: total energy, two complementary initiation propagation energies peak force correlated adopted From performed analyses, it was found that with reinforcing prone form wormhole defects across zone not only affect development, but also since they require less energy at break comparison fabricated without addition.