| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Equipment, Instrumentation and In-Situ Process Monitoring
|
| Presentation Title |
Using High-Speed Thermal Imaging to Understand Melt Pool Defects in Laser Powder Bed Fusion |
| Author(s) |
Alexander J. Myers, Guadalupe Quirarte, Syed Zia Uddin, Jonathan Malen, Jack Beuth |
| On-Site Speaker (Planned) |
Alexander J. Myers |
| Abstract Scope |
One major challenge associated with experimental temperature measurement methods in L-PBF is capturing temperature fields within and around melt pools. Using a high-speed color camera, we implement the two-color method of pyrometry with spatial and temporal resolutions on the order of microns and microseconds, respectively. Using this technique, our team monitors the melt pool temperature on two laser powder bed fusion (LPBF) metal-based additive manufacturing systems: the EOS M290 and Trumpf TruPrint 3000. Varying the camera’s parameters and filters in the optical path allows us to capture a wider temperature range. This system has been developed with the objective of capturing temperatures within the melt pool and near its solidification boundary. Imaging a variety of combinations of power and velocity from the process maps of both Ti-6Al-4V and 316L-SS, we associate the temperature fields to corresponding defect regimes with a favorable comparison to experimental melt pool width measurements. |