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MM: Fachverband Metall- und Materialphysik

MM 5: Nanomaterials I: Mechanics

MM 5.2: Talk

Monday, March 7, 2016, 10:30–10:45, H53

Mechanical properties of amorphous/crystalline multilayer structures in the Fe-P system — •Timo Müller, Andrea Bachmaier, Manuel Pfeifenberger, Thomas Schöberl, and Reinhard Pippan — Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Leoben, Austria

Nanolamellar structures of alternating amorphous and crystalline layers are good candidates for combining high strength and ductility due to the combination of the different deformation mechanisms in the two components. In the present study, such structures were prepared in the Fe-P system using electrodeposition. The width of the individual layers was varied from about 250 nm down to a few nanometers. Microhardness testing revealed a Hall-Petch behavior with respect to the layer width for layers larger than 15 nm, whereas an approximately constant hardness of 6.7 GPa was observed for thinner layers. Nanoindentation and micromechanical testing was used to get further insights into the mechanical behavior of these materials.