Linking phase field and finite element modeling for process-structure-property relations of a Ni-base superalloy

• Main Author: Fromm, Bradley S.
• Published: Georgia Institute of Technology 2013
• Subjects: Finite-element method; Crystal plasticity; Phase-field modeling; Process structure property relations; Microstructure-sensitive design; Microstructure; Finite element method; Materials science; Simulation methods
• Online Access: http://hdl.handle.net/1853/45789

Establishing process-structure-property relationships is an important objective in the paradigm of materials design in order to reduce the time and cost needed to develop new materials. A method to link phase field (process-structure relations) and microstructure-sensitive finite element (structure-property relations) modeling is demonstrated for subsolvus polycrystalline IN100. A three-dimensional (3D) experimental dataset obtained by orientation imaging microscopy performed on serial sections is utilized to calibrate a phase field model and to calculate inputs for a finite element analysis. Simulated annealing of the dataset realized through phase field modeling results in a range of coarsened microstructures with varying grain size distributions that are each input into the finite element model. A rate dependent crystal plasticity constitutive model that captures the first order effects of grain size, precipitate size, and precipitate volume fraction on the mechanical response of IN100 at 650°C is used to simulate stress-strain behavior of the coarsened polycrystals. Model limitations and ideas for future work are discussed.