About this Abstract |
Meeting |
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
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Symposium
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2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
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Presentation Title |
Use of In-Situ Thermography to Study Scan Strategy for Laser Foil Printing of Metallic Glass |
Author(s) |
Hung-Chu Chiang, Sung-Heng Wu, Chia-Hung Hung, Ming C Leu |
On-Site Speaker (Planned) |
Hung-Chu Chiang |
Abstract Scope |
This study investigates the Laser-Foil-Printing (LFP) additive manufacturing process for fabricate zirconium-based metallic glass (Zr₆₅.₇Cu₁₅.₆Ni₁₁.₇Al₃.₇Ti₃.₃), by utilizing in-situ thermography to obtain the relationship between laser scanning strategy and melt-pool cooling rate. To monitor thermal behavior during LFP processing, a mid-wavelength infrared (MWIR) camera was used to capture temperature data of melt pool and heat-affected zone in real time. This research focuses on cooling rates and temperature evolution required for maintaining amorphous structure and avoiding crystallization. Two scanning strategies—continuous welding and discrete welding— were evaluated. Continuous welding produces a broader heat-affected zone with gradually increasing cooling rates, while discrete welding generates localized heat input with higher and more stable cooling rates at individual weld spot locations. The experimental results highlight the critical role of laser scan strategy and thermal dynamics in controlling microstructure and quality of LFP-fabricated metallic glass. |
Proceedings Inclusion? |
Planned: Post-meeting proceedings |