Influence of Perforation of the Inner Layer on the Properties of Three-Layer Welded Materials Ordered Alumina Membrane

Multilayered materials give a range of possibilities with regard to control of their properties through selection of layers’ materials, their thickness and the layout of layers. This research is focused on examining the behaviour of three-layer material with perforated sheet as the inner layer during the stretching and drawing process. Four remove tests were carried out: Erichsen, Engelhardt-Gross, Fukui and cup drawing test. Mechanical properties and weld quality were also determined. Sheets with four perforations were used: Po2s3, Po2s4, Po2s10 and Po2s30, which corresponds to the open area values of 34.9%, 19.6%, 3.1% and 0.35%.