About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Metal Matrix Composites: Processing, Additive Manufacturing, and Applications
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| Presentation Title |
SiC Nanowhiskers in Magnesium Matrix Composites: PET and Plastic-Flow Behaviour |
| Author(s) |
Syahwira Taqwa TRIADI, Jue Zhu, Anne Bonnin, Julie Villanova, Wolfgang Ludwig, Jérôme Adrien, Jonathan Wright , Haixing Fang, Eric Maire, Milo S.P Shaffer, Qianqian Li |
| On-Site Speaker (Planned) |
Syahwira Taqwa TRIADI |
| Abstract Scope |
SiC nanowhiskers-reinforced magnesium (Mg) composites are promising lightweight structural materials for aeronautics and aerospace applications, but nanowhiskers agglomeration limits uniform dispersion during casting. In this work, SiC nanowhiskers were pre-loosened prior to casting to improve their dispersion in molten Mg. Nanowhiskers distribution and orientation were characterised using complementary 2D (SEM, EBSD) and 3D (phase-contrast holotomography, diffraction-contrast tomography) techniques. The results show that pre-loosening improved dispersion uniformity. During solidification, the nanowhiskers were preferentially pushed toward grain boundaries, consistent with Pushing-Engulfment Transition (PET) theory. Subsequently, rolling process aligned these PET-guided nanowhiskers along the rolling direction through plastic flow of the matrix, while also promoting a recrystallization pinning effect. This resulting alignment increased the orientation efficiency factor, enhancing mechanical properties along the rolling direction. This work demonstrates an effective strategy for controlling nanowhiskers orientation in Mg composites, providing a pathway toward high-performance structural materials with tailored anisotropy. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnesium, Composites, Solidification |