Berlin 2018 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 25: Topical Session (Symposium MM): Fundamentals of Fracture
MM 25.6: Vortrag
Dienstag, 13. März 2018, 13:00–13:15, TC 006
Fracture of solid bodies under high pressure torsion — •Roman Kulagin1, Yan Beygelzimer2,3, Andrej Mazilkin1,4, Emma Tröster1, Yuri Estrin5,6, and Horst Hahn1 — 1Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, Germany — 2Donetsk Institute for Physics and Engineering named after A.A. Galkin, Kyiv, Ukraine — 3Laboratory of Excellence for Design of Metal Alloys for Light Structures (DAMAS), Metz, France — 4Institute of Solid State Physics, Chernogolovka, Russia — 5Department of Materials Science and Engineering, Monash University, Clayton, Australia — 6Department of Mechanical Engineering, University of Western Australia, Nedlands, Australia
The widely known method of High Pressure Torsion (HPT) was first proposed and described by P. Bridgman in his motivating article [P.W. Bridgman, Phys. Rev. 1935, 48, 825]. The future Nobel Prize winner was inspired by a tremendous multitude of phenomena in Nature associated with shear under high pressure. In his work, P. Bridgman suggested that HPT results in discontinuities in the deforming material, which are immediately healed under high pressure. Our experimental results will show that in the materials which are deformed by the HPT method, fracture and healing processes occur concurrently. To describe the underlying processes, we will present a model of fracture of a structurally inhomogeneous body. It will be shown that, as a result of the fracture and healing processes, intensive deformation-induced mixing of the constituents of the material takes place.