About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
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Mechanical Response of Materials Investigated through Novel In-situ Experiments and Modeling
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Presentation Title |
Dislocation Density Inference from XRD Simulations of In-situ Microstructure Evolution Using Discrete Dislocation Dynamics |
Author(s) |
Dylan Madisetti, Jaafar El Awady |
On-Site Speaker (Planned) |
Dylan Madisetti |
Abstract Scope |
A computational framework for simulating x-ray diffraction was developed and implemented to track microstructure evolution from three-dimensional discrete dislocation dynamics (DDD) simulations. The model implements ray-tracing techniques and Bragg-scattering theory to track x-ray deflection and to characterize how the evolving dislocation microstructure produces a given diffraction pattern. While other studies have used similar techniques for static or relaxed microstructure configurations, the computational speed-ups provided by this method allow for in-situ tracking of diffraction patterns over the course of a virtual experiment. With this new framework, the evolution of dislocation microstructure can be tracked through time as a function of peak broadening. These results are then utilized to explanation observed in in-situ XRD patterns of micro-pillar loading experiments. |
Proceedings Inclusion? |
Planned: |
Keywords |
Modeling and Simulation, Characterization, Machine Learning |