The role of microstructure in Ni-base superalloy creep

Johannes Görler, Ruhr-Universität Bochum, Bochum, Germany

Nickel-base superalloys are the material of choice for many high temperature applications due to their exceptional creep resistance at elevated temperatures. This property is strongly connected to their unique microstructure consisting of cuboidal γ’ particles embedded in a γ matrix. A combined approach of phase-field method and phenomenological crystal plasticity is used to investigate creep deformation and its connection to the microstructure. A model for rafting during creep is employed and simulations are benchmarked with experiments. The focus of the talk is to discriminate the role of creep in the individual phases and the role of microstructure evolution during high temperature creep

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Session T1: Tuesday, 26 June 2018

Start: 12:30 p.m.
End: 12:45 p.m.