| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Friction Stir Welding and Processing XI
|
| Presentation Title |
Residual Stresses and Nanoscale Evolution in AA6061 Produced by Additive Friction Stir-deposition |
| Author(s) |
Luke N. Brewer, Ning Zhu, Dustin Avery, Paul G. Allison, James Brian Jordon, Yan Chen, Ke An |
| On-Site Speaker (Planned) |
Luke N. Brewer |
| Abstract Scope |
This presentation will discuss the first neutron diffraction study of an aluminum alloy produced by the additive friction stir-deposition (AFS-D) technique. Friction stir-related processes can generate considerable residual stresses, and this study aims to characterize the level and spatial distribution of these stresses in key locations. Neutron diffraction using the VULCAN beam line at the Spallation Neutron Source was successfully used to measure the distribution of residual stresses. The in-plane residual stresses were slightly compressive at the top of the build surface, close to zero in the bulk of the build, and were tensile in the substrate. As the tool translation speed increased, the magnitude of the residual stresses increased. These measurements also showed a clear shift in the d-spacing of the aluminum matrix in stress-free specimens, indicating that the nanostructure of the material is evolving as a function of position in the build and with tool translation velocity. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Aluminum, Characterization |