About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing: Beyond the Beam III
|
Presentation Title |
Material Flow and Microstructure Evolution during Additive Friction Stir Deposition of Aluminum Alloys |
Author(s) |
Mackenzie E.J. Perry, Hang Z. Yu |
On-Site Speaker (Planned) |
Mackenzie E.J. Perry |
Abstract Scope |
Developing an understanding of the synergy between material deformation and the resultant microstructure evolution is imperative for the full implementation of Additive Friction Stir Deposition. In this work, we systematically study the whole deposition via dissimilar cladding along with specific volumes within the deposited layer via embedded tracers printed at varied processing parameters. X-ray computed tomography and electron backscatter diffraction are employed to visualize the complex shape of the deposits and understand the microstructure progression. From dissimilar aluminum depositions, we find significant macroscopic interfacial mixing with unique 3-D features formed on the advancing side. From tracer experiments, there is drastic mesoscopic shape evolution: the initial cylinder shape is expanded to a spiral disc which is further transformed into long, thin ribbons. Significant grain refinement via geometric dynamic recrystallization occurs rapidly after exiting the tool. By analyzing the strain components, we estimate the lower bound for total strain to be ~101. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Aluminum, Other |