| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Beyond on the Beam IV
|
| Presentation Title |
Evolution of Precipitate Structure in AA7050 Produced by Additive Friction Stir Deposition |
| Author(s) |
Jacob Strain, Rekha Rao, Zachary Tew, Ismael Hidalgo, Paul Allison, Brian Jordon, Luke Brewer |
| On-Site Speaker (Planned) |
Jacob Strain |
| Abstract Scope |
This presentation will highlight nanoscale precipitate evolution caused by additive friction stir deposition (AFSD). The AFSD process is rapidly developing for large-scale, solid-state additive manufacturing. While the material does not melt during AFSD, the material generally experiences temperatures in excess of 70% of the melting point. These elevated temperatures, combined with severe plastic deformation, evolve the nature of the eta and eta prime strengthening precipitates in the AA7050 material. We are applying electron microscopy and atom probe tomography (APT) to AA7050 produced by AFSD. In as-deposited material, a bimodal distribution of precipitate sizes is generated, with a significantly larger size than in in the wrought feedstock material (AA7050-T7451). STEM-HAADF imaging combined with electron diffraction shows the prevalence of the eta phase on grain boundaries after deposition. Further electron diffraction and APT measurements will allow for the differentiation between the eta and eta prime distributions in the feedstock and as-deposited material. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Aluminum, Characterization |