| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Opportunities and Applications of Solid-State Additive Manufacturing Processes
|
| Presentation Title |
Repair of Aerospace Aluminum Through-Holes Utilizing Additive Friction Stir Deposition |
| Author(s) |
Mark Pandol, Greg Hahn, Kendall Knight, Hang Yu |
| On-Site Speaker (Planned) |
Mark Pandol |
| Abstract Scope |
Additive Friction Stir Deposition (AFSD) is a solid-state additive manufacturing process capable of depositing fully dense metallic parts by utilizing severe plastic deformation. The solid-state nature of AFSD allows for the repair of components made from non-weldable alloys. This work is focused on the fatigue performance of AFSD-repaired through-hole damage in AA7050, a non-weldable high strength aluminum alloy. Existing repair methodologies restore the original geometry at the cost of reduced fatigue performance. In contrast, the fatigue performance of AFSD-repaired material has shown substantial improvements over existing repair strategies — and for some loading conditions, it can even outperform the pristine material. This performance enhancement is attributed to changes in the crack initiation and propagation mechanisms because of the high shear nature of the AFSD process and the resulting dynamic microstructure evolution. |