Nowadays the automotive industry mostly prefers innovative solid-state welding technologies that would enable to welding of lightweight and high-performance materials. In this work. 3105-H18 Aluminium alloy (Al) and pure Copper (Cu) specimens with 0. 5 mm thickness have been ultrasonically welded in a dissimilar (Al-Cu) manner. https://foldlyers.shop/product-category/sponges/