Regensburg 2019 – scientific programme
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MM: Fachverband Metall- und Materialphysik
MM 38: Methods in Computational Materials Modelling (methodological aspects, numerics)
MM 38.1: Talk
Thursday, April 4, 2019, 15:00–15:15, H44
Materials with helical architecture obtained by High Pressure Torsion Extrusion — •Roman Kulagin1, Yan Beygelzimer1,2, Yuri Estrin3,4, Yulia Ivanisenko1, Dayan Nugmanov1, Andrej Mazilkin1,5, and Horst Hahn1 — 1Institute of Nanotechnology, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany — 2Donetsk Institute for Physics and Engineering named after A.A. Galkin, National Academy of Sciences of Ukraine, Kyiv, Ukraine — 3Department of Materials Science and Engineering, Monash University, Clayton, Australia — 4Department of Mechanical Engineering, The University of Western Australia, Crawley, Australia — 5Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Russia
Composite materials are widely used in engineering. Commonly, reinforcements have simple shapes of granules, fibers or laminae. By using free-end torsion, one can transform straight fibers into helicoidal ones. The report describes the High Pressure Torsion Extrusion (HPTE) process, which allows performing more complex transformations. For example, straight fibers can be transformed to complex helicoidal surfaces. This greatly expands the range of achievable architectures of composites, while at the same time improving the strength of their constituents through extreme grain refinement. A simple analytical model developed in this work and verified experimentally provides a platform for design of composite materials with HPTE-induced inner architectures.