| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Equipment, Instrumentation and In-Situ Process Monitoring
|
| Presentation Title |
Fringe Projection In Situ Monitoring of L-PBF Process for Evaluating Part Health |
| Author(s) |
Aaron T. McMillen, Sean Dobson, Niall O'Dowd, Ashley Paz y Puente |
| On-Site Speaker (Planned) |
Aaron T. McMillen |
| Abstract Scope |
In-situ process monitoring for laser powder bed fusion (L-PBF) remains a critical tool for determining part quality. Although several monitoring systems have explored evaluating surface roughness, the focus typically lies on preventing part-recoater interaction rather than on assessing part health. Recent studies have shown a strong correlation between surface roughness and the relative density of LPBF parts. This research leverages in-situ monitoring for surface characterization to establish correlations with porosity. By utilizing a fringe projection monitoring system to characterize the sample surface, a height map of each layer is generated. The in-situ roughness data is then compared with surface characterizations performed ex-situ using confocal laser scanning microscopy and X-ray computed tomography (XCT). Ultimately, both in-situ and ex-situ roughness data are correlated with porosity characteristics, also obtained through XCT. This work provides a compelling use case for leveraging readily available data to determine part health in-situ. |