| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior at the Nanoscale V
|
| Presentation Title |
Micromechanical Studies of Laser Surface Remelted Hypereutectic Al-20Si Alloy |
| Author(s) |
Huai-Hsun Lien, Amit Misra, Jyoti Mazumder |
| On-Site Speaker (Planned) |
Huai-Hsun Lien |
| Abstract Scope |
Heterogeneous metallic materials with multimodal grain size distribution of
constituent grains and phases show significant improvements in ductility at
yield strength comparable to their nanocrystalline counterparts. In this report, model system heterogeneous hypereutectic Al-20Si with μm-size coarse Al dendrites embedded in nm-size ultrafine Al-Si eutectic was fabricated by laser surface remelting (LSR). The mechanical properties of both the heterogeneous Al-Si structure and fully ultrafine eutectic was studied. Hardness testing and micropillar compression reveal different mechanical properties for as-cast Al-12Si eutectic, heterogeneous structure and fully ultrafine eutect. In addition, the hardness increases as the fraction of ultrafine Al-Si eutectic increase. in-situ SEM and in-situ TEM further reveal the deformation behaviors of micropillars and nanopillars. These findings are crucial to constructing the microstructure to mechanical property map for future guidance. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |