| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Solid Phase Processing Symposium
|
| Presentation Title |
Advances in Deformation and Microstructure Evolution Understanding in Additive Friction Stir Deposition |
| Author(s) |
Robert J. Griffiths, Mackenzie Perry, David Garcia, Jenny Sietins, Yunhui Zhu, Hang Yu |
| On-Site Speaker (Planned) |
Robert J. Griffiths |
| Abstract Scope |
Additive Friction Stir Deposition (AFSD) is a solid-state additive manufacturing process that can be used to deposit metals and composites in a freeform near-net shaping manner. Similar to other friction stir processes, there is a work space or “stir zone” within which material undergoes severe plastic deformation. However, during AFSD, this work space has different constraints than other friction stir processes, resulting in different directions and rates for material flow. Understanding the key behavior of material deformation and flow is vital for process optimization. Several key concepts are discussed including: material flow paths, tooling influence, resulting interfaces and part quality, and variability with material chemistry. X-ray computed tomography is employed to identify the material flow path and characterize the interfacial mixing; electron backscattered diffraction coupled with rapid cooling is used to identify localized strain and deformation during AFSD; high speed imaging is used to characterize the surface material flow . |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |