About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
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Symposium
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Additive Manufacturing of Metals: Equipment, Instrumentation and In-Situ Process Monitoring
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Presentation Title |
Advancing Measurement Science of Laser Powder Bed Fusion (LPBF) Process Monitoring Applying Thermal Imaging |
Author(s) |
Guadalupe Quirarte, Syed Zia Uddin |
On-Site Speaker (Planned) |
Guadalupe Quirarte |
Abstract Scope |
Accurate measurement of melt-pool temperature in the laser powder bed fusion (LPBF) process would result in an enhanced process control and qualification and in high-fidelity data for process modelling input and machine learning. Both the high speed associated with the laser and the change of phases and morphology during LPBF processing make it a challenging task to experimentally measure the melt-pool temperature using conventional infrared imaging or pyrometry. We are focused on developing real-time thermal imaging of AM tool melt-pool and surroundings leveraging the principle of dual wavelength pyrometry. Data is acquired using a high-speed camera operating at a shutter speed range of 30-40 microseconds and 6400 frames per second. Unique challenges associated with the methodology and corresponding calibration efforts were also outlined. Finally, the results presented would show the melt-pool temperature fields and shapes for different commonly used LPBF materials such as Ti-6Al-4V and 316L-SS. |