Regensburg 2019 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 2: Topical session (Symposium MM): High entropy and compositionally complex alloys

MM 2.6: Talk

Monday, April 1, 2019, 12:15–12:30, H43

High-pressure torsion produced lamellar structure between single phaseequiatomic FCC CoCrFeMnNi and single phase BCC HfNbTaTiZr HEAs — •Shabnam Taheriniya, Sergiy V. Divinski, and Gerhard Wilde — Institute of Materials Physics, University of Münster, Münster, Germany

High-pressure torsion (HPT) was utilized to analyze deformation induced bonding and mixing of dissimilar high entropy alloys (HEAs). A single phase equiatomic FCC Cantor alloy, CoCrFeMnNi, and equiatomic HfNbTaTiZr as a single phase BCC HEA are attached and deformed for 5, 10 and 15 revolutions using HPT with a pressure of 9 GPa. The resulting structure and the local microstructure at the interfaces are observed and analyzed using scanning electron microscopy (SEM), electron back-scatter diffraction (EBSD) and transmission electron microscopy (TEM). Furthermore, the chemical composition at the interface is investigated using energy dispersive X-ray spectroscopy (EDX). The results are discussed and analyzed with respect of the mechanisms responsible for shear induced mixing/bonding at the interfaces under the specific conditions provided by high entropy alloys.