| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
The effect of copper content on high strength precipitation hardened aluminum alloys processed via Additive Friction Stir Deposition |
| Author(s) |
Jacob Strain, Luke Brewer |
| On-Site Speaker (Planned) |
Jacob Strain |
| Abstract Scope |
This presentation will highlight the differences in the evolution of intermetallic phases for AA7XXX aluminum alloys deposited via additive friction stir deposition (AFSD). AFSD is a solid-state process that exposes feedstock material to temperatures 70-90% of the melting temperature while experiencing severe plastic deformation for applications of additive manufacturing and repair. AA7020, AA7050, and AA7075 were chosen for this study due to their notable variations in copper content (0-2.5 wt%). Previous research has shown that the Al2CuMg and Zn2Mg phases grow significantly during the AFSD process but are sensitive to the particular thermal cycle of the process. Electron microscopy, x-ray diffraction, and differential scanning calorimetry (DSC) show copper additions increase the spatial density of intermetallic phases present in these different alloys after being processed by AFSD. Additionally, we are using in situ neutron diffraction to examine at what temperatures these phase form, dissolve, and reprecipitate, mimicking the AFSD thermal cycle. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Aluminum, Phase Transformations |