Dresden 2017 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 39: Topical session: Interface-Controlled Microstructures: Mechanical Properties and Mechano-Chemical Coupling - Structure and deformation III

MM 39.2: Vortrag

Mittwoch, 22. März 2017, 10:30–10:45, IFW B

Micro-mechanics of amorphous metal/polymer hybrid structures with 3D cellular architectures: size effects, buckling behavior and energy absorption capability — •Maxime Mieszala¹, Laszlo Petho¹, Johann Michler¹, Madoka Hasegawa¹, Jens Bauer², Oliver Kraft², and Laetitia Philippe¹ — ¹Empa, Materials Science and Technology, Thun, Swiitzerland — ²Karlsruhe Institute of Technology, Institute for Applied Materials, Karlsruhe, Germany

By designing advantageous cellular geometries and combining the material size effects at the nanometer scale, lightweight hybrid micro-architectured materials with hierarchical cellular structures and tailored structural properties are achieved. To determine the mechanical performance of polymer cellular nanolattices reinforced with a metal coating, 3D laser lithography and electroless deposition of an amorphous layer of NiB is used to produce metal/polymer hybrid structures. Microcompression experiments show an enhancement of the mechanical properties with the thickness of the NiB layer, suggesting that the deformation mechanism and the buckling behavior are controlled by the size induced brittle-to-ductile transition in the NiB layer. In addition, the energy absorption properties demonstrate the possibility of tuning the energy absorption efficiency with adequate designs.