Micromechanical analysis of dislocation networks at dynamic ɣ/ɣ’ interfaces (C08#)

• Subject Area: Thermodynamics and Kinetics as well as Properties of Phases and Microstructure of Materials
• Term: from 2021 to 2023
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 190389738

Project C8 aims at answering the questions if experimentally observed grooves and ledges around ɣ’ particles is an effect mainly driven by cooling or if it is a dynamic effect during deformation as well as the effect of the misfit dislocation network on rafting of ɣ’ particles. This is achieved through a simplified model for dislocation climb and dynamic coupling of discrete dislocation dynamics with the phase field method. Parametrization and calibration is achieved using previous works as well as a direct comparison to shear creep experiments from other projects of SFB/TR 103. The work of project C8 will answer long standing experimental observations and extends the current understanding of the evolution of the microstructures in superalloys.

• DFG Programme: CRC/Transregios
• Subproject of: TRR 103: From Atoms to Turbine Blades - A Scientific Approach for Developing the Next Generation of Single Crystal Superalloys
• Applicant Institution: Ruhr-Universität Bochum
• Project Head: Professor Dr.-Ing. Markus Stricker