Regensburg 2022 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 20: Computational Materials Modelling: HEA, Alloys & Nanostructures
MM 20.2: Vortrag
Mittwoch, 7. September 2022, 10:30–10:45, H44
Impact of high-pressure torsion and post-deformation annealing on CoCrFeMnNi high-entropy alloy with carbon content — •Sandra Hecht, Sergiy V. Divinski, and Gerhard Wilde — Institute of Materials Physics, University of Münster, Münster, Germany
The well-known Cantor alloy CoCrFeMnNi provides attractive mechanical properties and strength-ductility combinations, which can be improved by further alloying of small amounts of carbon.
In the present work, the impact of high-pressure torsion (HPT) and post-deformation annealing on equiatomic Cantor alloy and nearly-equiatomic (C alloyed (4.4 at.%)) Cantor alloy, produced via arc-melting and subsequent homogenization at 1373 K for 3 days under pure Ar, is examined. The thermal, mechanical and microstructural properties of the initially coarse-grained samples were investigated before and after deformation at room temperature (5 rotations at 8 GPa) and afterwards post-deformation annealing treatments using differential-scanning calorimetry (DSC), X-ray diffraction (XRD), scanning and transmission-electron microscopy (SEM & TEM) as well as micro-hardness measurements. Impact of the interstitial carbon and in particular the carbides Cr23C6 on the mechanical response and microstructure evolution is examined.