| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Friction Stir Welding and Processing XIII
|
| Presentation Title |
Metal Matrix Composites of Al/Al2O3 Obtained via Friction Stir Processing |
| Author(s) |
Marta Lipinska, Florian Pixner, Andreas Hütter, Norbert Enzinger, Małgorzata Lewandowska |
| On-Site Speaker (Planned) |
Marta Lipinska |
| Abstract Scope |
In this work, friction stir processing (FSP) was used to manufacture composites from two materials – commercially pure aluminium and Al-Mg-Si alloy with Al2O3 nanoparticles. For pure aluminium, the addition of the reinforcement resulted in a considerable increase in the microhardness (about 60%). Moreover, nanoparticles inhibited grain growth when compared to samples processed without them. The average grain size with the addition of the reinforcement was 4 µm, while without – 12 µm. For the Al-Mg-Si alloy, the obtained results are much more complex. Different heat treatments were applied after the FSP; however, independent, the higher hardness was obtained for the samples without nanoparticles. The microstructure observations revealed that nanoparticles stabilized the grain size. Nevertheless, they also influenced the second-phase precipitates, the main strengthening factor. The size of observed precipitates is bigger compared to the samples without the nanoparticles; also, precipitate-free zones are present, which results in a decreased microhardness. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Aluminum, Composites, Characterization |