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

Gebäude ICFO, Ebene 04, Raum 305
Activities: Research Assistant
Mechanical and microstructural investigations accompanying the development of a new polycrystalline superalloy. In his research project, Julian Hunfeld collaborates with an industry partner, who aims at introducing a new polycrystalline Ni-base superalloy into the market. The new alloy should outperform previous established alloys with a special focus placed on the mechanical performance at high temperatures, in the 900°C range. In a first step, Julian Hunfeld performs numerical thermodynamic calculations using MatCalc©, in order to find out which phases are expected for a given alloy composition and to compare their stabilities for different chemical compositions. Based on these calculations, the industry partner produces test alloys which are subsequently characterized using metallographic methods and mechanical experiments. A special focus is placed on the microstructural evolution during heat treatments and the effects of microstructure on hardness results and on creep. Julian Hunfeld performs hardness tests and creep tests and analysis the de-formed material states using scale bridging metallographic analysis (using optical and electron (SEM and TEM)) analysis). He also takes a look at specimens which were fatigue tested in an external research laboratory. Julian Hunfeld’s research aims at contributing to an optimized procedure for a systematic development of new Ni-base high temperature alloys.

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