About this Abstract |
Meeting |
TMS Specialty Congress 2025
|
Symposium
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The 7th International Congress on 3D Materials Science (3DMS 2025)
|
Presentation Title |
Grain Structure Evolution During Heat Treatment of a Semisolid Al-Cu Alloy Studied With Lab-Based Diffraction Contrast Tomography |
Author(s) |
Jun Sun, Jules Dake, Jette Oddershede |
On-Site Speaker (Planned) |
Jun Sun |
Abstract Scope |
3D experimental data of simultaneously high temporal and spatial resolution is key to validation of computational modelling of materials phenomena. In this study, we exploit lab-based X-ray imaging, combining absorption contrast tomography and diffraction contrast tomography, to capture the evolution of grain structure over a series of interrupted in-situ heat treatments of a semisolid Al-Cu alloy.
Multiple aspects of the microstructure are characterised comprehensively on the meso-scopic scale, including grain coarsening driven by Ostwald ripening, grain rotation driven by grain boundary energy as well as grain boundary wetting. With the time resolved response of the selected Al-Cu model alloy system, the present work provides insights into the rearrangement, densification and coarsening of powder compacts at late-stage sintering, revealing the crucial impact of crystallography upon the microstructural evolution. |
Proceedings Inclusion? |
Undecided |