Regensburg 2019 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 38: Methods in Computational Materials Modelling (methodological aspects, numerics)

MM 38.1: Vortrag

Donnerstag, 4. April 2019, 15:00–15:15, H44

Materials with helical architecture obtained by High Pressure Torsion Extrusion — •Roman Kulagin¹, Yan Beygelzimer^1,2, Yuri Estrin^3,4, Yulia Ivanisenko¹, Dayan Nugmanov¹, Andrej Mazilkin^1,5, 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.