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The production of metallic sheet composites by rolling is a manufacturing route in which the quality of the bond between the layers directly determines the integrity and further processability of the final product. This paper is based on laboratory experiments carried out on clad aluminium sheets and examines the conditions under which a reliable bond can be formed during rolling. The work focuses on the basic bonding tests performed with a Ford-type tool, the rolling of three- and multilayer packages, the metallographic evaluation of the layer interface, and peel testing used for the quantitative assessment of bond strength. The investigated systems included AlMnCu/Al99.7/AlSi10 and AlMnSi/Al99.5/AlSi10 layer arrangements. The experiments were performed mainly in the temperature range of 480-520 °C, with total reductions between 40 and 80 %. The results showed that bonding cannot be interpreted as the effect of a single technological parameter. Temperature, reduction, surface condition, deformation compatibility of the layers and the elongation ratio between the cover sheet and the core material all have a decisive role. Based on the T-peel tests and metallographic observations, a technological window can be identified in which the first bonding passes support both the closing of the layers and the bond reliability required for subsequent rolling. The presented approach supports the preliminary laboratory assessment of metallic sheet composite structures and the planning of stable rolling schedules.
Keywords: Metallic sheet composite, cladding, rolling, pass design, bond quality© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.