Кафедра обробки металів тиском (ДМетІ)

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UK: Кафедра обробки металів тиском ім. акад. О.П.Чекмарьова (Дніпровський металургійний інститут, ДМетІ) EN: Department of Metal Forming (DMetI)

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    Influence of Deformation Parameters on Mechanical Behaviour of Aluminium-Magnesium Roll-Bonded Composites with Kirigami-Structured Inlays
    (Dnipro University of Technology, Dnipro, 2025) Frolov, Yaroslav V.; Nuernberger, Florian; Konovodov, Dmytro V.; Bobukh, Oleksandr S.; Boiarkin, Viacheslav V.
    ENG: Purpose. To assess how the mechanical properties of a composite material comprising EN AW 1050 aluminium, and kirigami-inspired structure made from E235 steel and AZ31 magnesium alloy, depend on the initial configuration of its components and the degree of reduction during roll bonding. Methodology. The study involved roll-bonding five-layer composite sheets with the following configuration: two of the internal layers consisted of a kirigami structure implemented using an expanded metal mesh made from low-carbon steel. The outer matrix layers were aluminium alloy sheets, and the core matrix layer was formed from magnesium alloy sheets. The transformation of the kirigami structure within the composite was assessed using X-ray analysis. The mechanical properties of the composites were evaluated using three methods: impact bending tests, three-point bending tests and ball indentation tests. Findings. Experimental investigations yielded data on how the kirigami structure transforms within the five-layer composite, depending on the rolling reduction. It was found that a rolling reduction of 55 % provided an isotropic mechanical response. Mechanical testing showed that the energy absorption capacity was enhanced by 60–70 % with kirigami inlay, even under complex stress–strain conditions. The stiffness of the reinforced composite was found to be several times higher than that of unreinforced aluminium. Originality. This study is the pioneer in analysing the combined effect of component configuration and rolling reduction on the mechanical behaviour of a five-layer aluminium-magnesium composite reinforced with a steel kirigami structure. The study demonstrated that deformation parameters ensured reliable bonding between the aluminium and magnesium layers and significantly enhanced mechanical performance by controlling the transformation of the kirigami structure. Practical value. The findings of this study enhance our understanding of how rolling reduction and initial layer configuration affect the deformation behaviour of multilayer Al-Mg composites. They also lay the groundwork for designing novel composites reinforced with kirigami structures for advanced structural applications.