About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
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Symposium
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Additive Manufacturing: Equipment, Instrumentation and In-Situ Process Monitoring
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Presentation Title |
High-Speed Thermal Imaging of the Melt Pool in Laser Powder Bed Fusion |
Author(s) |
Guadalupe Quirarte, Alexander Myers, Syed Zia Uddin, Jack Beuth, Jonathan Malen |
On-Site Speaker (Planned) |
Guadalupe Quirarte |
Abstract Scope |
Limited understanding of the temperature fields in metal-based additive manufacturing (AM) systems represents a challenge in process monitoring improvement. Experimental measurements of the melt pool temperature using conventional infrared imaging techniques or pyrometry lack the temporal and spatial resolution needed to determine melt pool temperature profiles. This project aims to develop an experimental method to measure melt pool and surrounding temperatures using a high-speed color camera (>50,000 frames per second). This method creates real-time thermal imaging AM tool leveraging the principle of two-color pyrometry, where each pixel acts as a two-color pyrometer. Dual-wavelength pyrometry is advantageous because it is less sensitive to melt pool emissivity and plume transmissivity. To validate the setup’s alignment with Planck’s blackbody theory and test the imaging system’s temperature measuring capability, a NIST blackbody source thermal calibration was conducted. The preliminary results are composed of melt pool temperatures from single bead scans of Ti-6Al-4V and 316L-SS. |