Berlin 2018 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 55: Topical session (Symposium EPS and MM): Mechanical Properties at Small Scales

MM 55.2: Talk

Thursday, March 15, 2018, 12:15–12:30, H 0106

Cu/Fe Nanocomposites produced by Accumulative Roll Bonding — •Maher Ghanem, Benoit Merle, Heinz Werner Höppel, and Mathias Göken — Friedrich-Alexander-Universität Erlangen-Nürnberg, Department Werkstoffwissenschaften, Lehrstuhl Allgemeine Werkstoffeigenschaften (WW I); Martensstraße 5, 91058 Erlangen, Deutschland

The accumulative roll bonding (ARB) process has been applied to produce multilayered composites with layer thickness in the range of submicron to nanometer. Such multilayered composites show a strong increase in strength as the grain sizes are refined down to the submicron range. CuSn4/Fe multilayered nanocomposites with alternating layers of CuSn4 and Fe (99.88%) were roll bonded with 50% reduction and a post heat treatment at 400 °C following each pass. The rolling was repeated at least 10 times in order to achieve a layer thickness less than 1 um. Microstructure and texture of the nanocomposites were evaluated using backscatter electron (BSE) imaging and electron backscatter diffraction (EBSD), respectively. Mechanical properties were investigated through tensile and nanoindentation tests in order to observe the changes in the mechanical properties both locally and globally as the number of ARB passes increased. Furthermore, the layer interfaces of the nanocomposite at different rolling cycles were analyzed using Atom Probe Tomography (APT).