| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
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| Symposium
|
Microstructural Evolution and Material Properties Due to Manufacturing Processes: A Symposium in Honor of Anthony Rollett
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| Presentation Title |
Grain-Resolved Reorientation and Orientation Gradient Development in Cyclic Loading of Ti-7Al Using High Energy X-Ray Diffraction Microscopy |
| Author(s) |
Rachel Lim, Sven Gustafson, Darren Pagan, Anthony Rollett |
| On-Site Speaker (Planned) |
Rachel Lim |
| Abstract Scope |
On the grain scale, materials are heterogeneous and anisotropic which can lead to development of significant grain-scale stresses in polycrystals. Increasing understanding of the effects of this heterogeneity and anisotropy requires experiments which supply three-dimensional, in situ data. High energy X-ray diffraction microscopy (HEDM) is employed to study the in situ grain-resolved evolution of Ti-7Al under during 200 tensile loading cycles below macroscopic yield. Individual grain reorientations are tracked using grain-averaged orientations from far-field HEDM, while spatially-resolved orientations reconstructed via near-field HEDM show the development of slight orientation gradients in some of the grains after the 200 cycles. A comparison between the orientation changes calculated across these two measurements shows both grains with large average reorientations and some with orientation gradient development.
This work was prepared under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. Document LLNL-ABS-866502. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Titanium, |