| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Opportunities and Applications of Solid-State Additive Manufacturing Processes
|
| Presentation Title |
Microstructural Effects of AFSD Repair on High Strength AA7050 Components |
| Author(s) |
Luke Hagedorn, Greg Hahn, Kendall Knight, Hang Yu |
| On-Site Speaker (Planned) |
Luke Hagedorn |
| Abstract Scope |
Additive Friction Stir Deposition (AFSD) is a solid-state additive manufacturing process that utilizes severe plastic deformation and frictional heat generation to deposit fully dense metallic components. This is of particular interest for high strength aluminum alloys, which are susceptible to hot cracking during melt-based additive manufacturing. The solid-state nature of AFSD has allowed for defect free deposition of AA7050, a non-weldable high strength aluminum alloy. In addition to bulk depositions, AFSD has been used to blend existing and new materials to allow for the repair of deep volumetric damage in components, e.g., through holes. The repair process results in several distinct microstructural regions across the repair volume in AA7050. The unique thermomechanical processing conditions of AFSD have led to both a combination of desirable and undesirable microstructural changes but ultimately improve the fatigue behavior of repaired components under tension-tension loading conditions. |