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M.Sc. Christian Reinhart
Lehrstuhl Werkstoffwissenschaft
Institut für Werkstoffe
Fakultät für Maschinenbau
Ruhr-Universität Bochum
Universitätsstr. 150
44780 Bochum

Gebäude ZGH, Ebene 01, Raum 123
Activities: Research Assistant
Investigation on the effect of Cr to Ni ratio on solid solution strengthening in high-entropy alloys. Christian Reinhart investigates the mechanical properties of high-entropy alloys at different temperatures. High-entropy alloys usually consist of five elements, which are present in similar concentration (3-35 at.%). The most well-known example here is the alloy CrMnFeCoNi, where all five elements are present in the same concentration. This alloy forms a single-phase cubic face-centered solid solution, similar to austenitic steels. The alloys are cast, forged and heat treated by him. Since high-entropy alloys are still relatively new alloys, it is first necessary to clarify basic mechanical properties by tensile- and compressive tests. In a second step, the focus is on the microstructure. For this investigation, the microstructure is analysed during different temperatures and deformations with light-, scanning- and transmission electron microscopy. The aim of this project is to set the microstructural properties in combination with the mechanical properties in complex mixed crystals and to create a basic understanding of this new type of alloys. For this purpose, transmission electron microscopy is used to investigate the stacking fault energy for various high-entropy alloys. It is believed that the stacking fault energy is related to the twinning formation, which in turn has a decisive influence on the mechanical properties.

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