About this Abstract |
Meeting |
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
|
Symposium
|
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
|
Presentation Title |
Force Reduction Through Electrically Assisted Friction Stir Additive Manufacturing |
Author(s) |
Laura Catalano, Cordelia Norris, Elizabeth Mamros, John T Roth |
On-Site Speaker (Planned) |
Laura Catalano |
Abstract Scope |
The repair process for aluminum alloy 7075 (AA 7075) typically consists of a friction stir additive manufacturing (FSAM) process, to avoid hot cracking and high residual stresses. One of the largest challenges with this process is the high axial force required to deposit the consumable tool onto the substrate. One possible solution is utilizing electrical assistance, since the yield strength of the alloy decreases with increasing current density, when depositing the bar stock. This work investigates the varying current densities to address one of the core challenges of additive manufacturing – the high force requirements. Of interest for military applications is the repair of damaged fastener holes on aircraft. With this eventual application in mind, 5/16” diameter holes are drilled and repaired for this study. The material properties of AA 7075 stock material are compared to a filled repair using FSAM techniques both with and without electricity incorporated. |
Proceedings Inclusion? |
Planned: Post-meeting proceedings |