| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Ultrafine-grained and Heterostructured Materials (UFGH XI)
|
| Presentation Title |
N-32: Joining of Ultrafine Grained Aluminium by Friction Stir Welding-processing, Microstructure and Properties of Similar and Dissimilar Welds |
| Author(s) |
Marta Orlowska, Lech Olejnik, Andreas Huetter, Norbert Enzinger, Malgorzata Lewandowska |
| On-Site Speaker (Planned) |
Marta Orlowska |
| Abstract Scope |
Severe plastic deformation processes allow to produce materials with grain size reduced below 1 µm. It causes an increase in mechanical properties, however, such materials feature limited thermal stability. Therefore, advanced joining techniques are required to preserve refined microstructure. In the present study, Incremental ECAP and Friction Stir Welding have been chosen as deformation and joining techniques, respectively. Similar and dissimilar (the samples with different deformation strain were joined) welds were obtained and featured good quality. The evolution of microstructure and mechanical properties from the base material to the stir zone was investigated. For this purpose SEM/EBSD, TEM, microhardness measurements and tensile tests were performed. The results revealed a grain growth in the stir zone to the value of 2.1-3.7 µm. It caused a drop of mechanical properties in comparison to ultrafine grained base materials but an increase in comparison to annealed aluminium. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume |