About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Defects and Interfaces: Modeling and Experiments
|
Presentation Title |
Deformation of Ti Polycrystals from 3D Diffraction Contrast Tomography Data: Experiments and Simulations |
Author(s) |
Eugenia Nieto Valeiras, Alberto Orozco-Caballero, Maral Sarebanzadeh, Jun Sun, Javier Llorca |
On-Site Speaker (Planned) |
Eugenia Nieto Valeiras |
Abstract Scope |
A combined experimental and simulation strategy is presented to evaluate the impact of slip transfer on the deformation mechanisms in Ti. From the experimental viewpoint, a pure Ti sample was scanned by 3D diffraction contrast tomography prior to deformation. Slip transfer across grain boundaries and the strain distribution after deformation were ascertained by means of high-resolution digital image correlation. Simultaneously, a representative volume element of the microstructure was generated from the 3D data, ensuring a direct correspondence between model and microstructure. The mechanical behavior of the polycrystal was simulated using a dislocation-based crystal plasticity model that accounts for slip transfer/blocking. The hardening of the different slip systems was determined using a generalized Taylor model, where the critical resolved shear stress was fitted for each slip system family. The analysis of the experiments alongside the numerical simulations provided a comprehensive understanding of the deformation mechanisms across grain boundaries in pure Ti. |
Proceedings Inclusion? |
Planned: |
Keywords |
Titanium, Thin Films and Interfaces, Computational Materials Science & Engineering |