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Tailoring metallic-organic interfaces

Bachelor thesis project: students applied and experimental physics

Metal-polymer laminates of electrolytic chromium coated steel plate (ECCS) are increasingly used for packaging of food and beverages. Production of cans and canisters out of these materials has clear advantages compared to the use of blank steel sheets. From a materials point-of-view there are a number of challenges since the polymer coated sheet is subjected to severe loading conditions during forming, e.g. repeated drawing and wall ironing. The investigations on deformation mechanisms over many length scales is obviously essential to study the delamination of the metal-polymer interface. The complete sequence of length scales from (essentially) single crystal to polycrystal will be studied on appropriate model systems. The main reason to engage in studies on model systems is to attempt to isolate the various mechanisms that may lead to interface damage in experiments that are as simple as possible. This will allow a detailed comparison with calculations with a minimum of fitting parameters. The simplifications with respect to the industrial reality are arrived at by creating microscale samples with FIB and by the choice of appropriate materials.

p8Fig.: Several microscopic sample geometries are illustrated.Substrate and interface deformationare measured along Focused Ion Beam cuts. These can be compared to calculations in which substrate deformation may either be used as boundary condition, or in which is it is the outcome of calculations itself.

 


Contact:
Dr. Ir. Willem-Pier Vellinga, kamer gebouw 13.048, e-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it tel: 050-3634821
Prof.dr J.Th.M. De Hosson, kamer gebouw 13.041, e-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it