|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advanced Characterization Techniques for Quantifying and Modeling Deformation
||Representative Volume Generation from 2D EBSD Maps and their Implementation in FFT Based Crystal Plasticity Models
||Simon Wyatt, T Ben Britton
|On-Site Speaker (Planned)
Microstructural examination using electron backscatter diffraction (EBSD) is commonly used to evaluate the surface morphology and crystallography of 3D polycrystals. These observations can be combined with local strain measurements, e.g. using DIC for surface total strain evaluation, or HR-EBSD for surface 3D residual stress and lattice rotation evaluation. These fields can also be computed using crystal plasticity (CP) based simulations, such as FFT solvers in DAMASK. Unfortunately, comparison of surface strain fields and characterisation of surface microstructure is modulated by sub-surface grain structure. Furthermore, CP-FFT solvers impose periodic boundary conditions on the simulation volume. We present a modelling tool that is constrained to generate the surface microstructure and representations of sub-surface microstructure informed by microtexture and grain statistics, combined with methods of breaking the periodic boundary condition. Ultimately, this tool enables the impact of sub-surface microstructure to be quantified when comparing simulations and experiments.
||Planned: Supplemental Proceedings volume