RESEARCH OF THICKNESS OF INDIVIDUAL LAYERS DURING THE ASSEMBLY OF A FIVE-LAYER ALUMINIUM BASED SAMPLES

The development of innovative technology, primarily aerospace technology, forces us to move from monometals to layered and multilayer materials, because the combination of various metals or alloys can provide improved performance properties and the creation of new devices and products. Aluminum-lithium alloys have excellent mechanical, performance and anti-corrosion properties, which allow them to compete with traditional alloys, including polymer composite materials. And that is why they are attractive materials for producing layered metal composites. In this work, using cold longitudinal rolling, samples of a five-layer metal composite from aluminum-lithium alloy 1420, D16 duralumin and commercially pure A0 aluminum were obtained. Photo images of the macrostructure of the obtained multilayer samples and the results of measuring the thickness of the layers are presented. Based on the obtained measurement results, graphs were constructed for changes in the deformation of the layers. A study of the macrostructure of samples obtained by alternating layers of aluminum alloys 1420, D16 with layers of technical aluminum A0, as well as from technical aluminum A0 without the use of other alloys, showed that the position of the layer and the properties of the material affect the degree of deformation of individual layers. In the case of samples with alloys 1420, D16 and A0, the aluminum layers adjacent to the tool experience the least deformation compared to the central layers during the first 3 cold rolling transitions. As the number of transitions increases (to 5 ‒ 6), the degree of deformation of the layers levels out. The thickness of the inner layer remains virtually unchanged until the last rolling in all resulting combinations of materials.

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