| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Opportunities and Applications of Solid-State Additive Manufacturing Processes
|
| Presentation Title |
Enhancing Microstructure and Mechanical Properties of 7075 Aluminum Walls Using a Hybrid Wire-Arc Directed Energy Deposition and Friction Stir Process |
| Author(s) |
Dinh Son Nguyen, Soumya Sridar, Wei Xiong, Albert To |
| On-Site Speaker (Planned) |
Dinh Son Nguyen |
| Abstract Scope |
High-strength 7075 aluminum alloys possess excellent strength and fatigue resistance amongst the lightweight metal alloys. Wire-arc directed energy deposition (wire-arc DED) is characterized by low-cost feedstock, high material utilization, and high production efficiency. However, fabricating Al 7075 components via wire-arc DED is challenging because the material is difficult to weld, leading to issues such as excessive amount of porosity and large columnar grains, which result in lower strength and ductility. Meanwhile, friction stir processing (FSP) is capable of refining the grain structure of aluminum alloys. This work attempts to enhance microstructure and mechanical properties in an Al 7075 wall by means of an integrated hybrid wire-arc DED/FSP/milling system. Using this system, the different processes are applied in sequence to process every layer of the build. Our results show that the hybrid process can reduce porosity, refine grain structure, and improve mechanical properties. |