About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Three-Dimensional Synchrotron X-Ray Imaging and CALPHAD Modeling of SiCp Strengthening in AZ91 and LAZ561Ca Magnesium Alloys |
| Author(s) |
Ming-Hung Wu, Si-Yuan Hu, I-An Chen, Kai-Yu Liang, Hsiu-Chien Chan, Yen-Fang Song, Gung-Chian Yin, Te-Cheng Su |
| On-Site Speaker (Planned) |
Ming-Hung Wu |
| Abstract Scope |
Most magnesium alloys are manufactured by die casting due to their limited formability, but thixomolding has recently gained attention for producing low-porosity components in 3C electronic applications. This study investigates AZ91 and LAZ561Ca magnesium alloys processed via both thixomolding and rolling, with and without SiC particle reinforcement. CALPHAD simulations were employed to predict phase stability and solidification paths, which informed the design of post-processing heat treatments. Microstructural characterization was performed using SEM and TEM, while XRD analysis identified key precipitates such as Mg17Al12, AlLi, Al2Ca, and MgLi2Al. Additionally, synchrotron X-ray tomography was utilized to reconstruct the three-dimensional morphology and spatial distribution of precipitates. The study reveals how composite additions and processing history influence phase formation, grain structure, and mechanical properties. Notably, Al2Ca was found to provide a more effective grain boundary pinning effect than Mg17Al12, contributing to enhanced thermal stability and microstructural refinement in these high-performance magnesium alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnesium, Composites, Mechanical Properties |