About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Symposium
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2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Presentation Title |
Cooling Rate Measurement in Directed Energy Deposition using Photodiode-based Thermometry |
Author(s) |
Jihoon Jeong, Samantha Webster, Shuheng Liao, Jon-Erik Mogonye, Kornel Ehmann, Jian Cao |
On-Site Speaker (Planned) |
Jihoon Jeong |
Abstract Scope |
Laser powder blown Directed Energy Deposition (DED) is a rapidly emerging additive manufacturing (AM) technology for repairing and producing net-shaped components. Rapid cooling rates and variation in microstructure across a part are unique features of the DED process. This is due to heat accumulation during layer-by-layer deposition and periodic reheating and cooling of layers, which ultimately result in mechanical property gradients. In our open-architecture DED system, we utilize photodiode-based thermometry to monitor in-situ melt pool temperature and quantify the cooling rate at a 100 kHz acquisition rate. The measurement of the cooling rate at various process parameters will be discussed. Additionally, the use of photodiode-based thermometry in the DED system will be presented. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |