About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
|
Symposium
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Process Development
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Presentation Title |
Pore Coalescence in Directed Energy Deposition Using in-situ X-ray imaging and Infrared Thermography |
Author(s) |
Karan Kankaria, Niranjan Parab, Benjamin Gould, Aaron Greco, Tao Sun, Sarah Wolff |
On-Site Speaker (Planned) |
Karan Kankaria |
Abstract Scope |
Directed Energy Deposition has exceptional potential as a metal additive manufacturing process due to its capability to build multi-material parts with controlled microstructure. However, control of porosity remains a major challenge for part qualification and certification. In-situ high speed X-ray imaging combined with thermal imaging gives a clear insight into the evolution of this porosity. Depending on the local density of pores, some pores coalesce to form larger spherical pores whereas some slowly shrink to give flattened pores and the remaining pores either burst or reach the surface. This work can help control porosity by laser parameters and thermal history of the melt pool. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |