About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
|
Additive Manufacturing: Equipment, Instrumentation and In-Situ Process Monitoring
|
Presentation Title |
A-21: Quantification of Melt Pool Variability for L-PBF Additive Manufacturing by High-Speed Imaging |
Author(s) |
David Guirguis, Conrad Tucker, Jack Beuth |
On-Site Speaker (Planned) |
David Guirguis |
Abstract Scope |
Laser powder bed fusion (L-PBF) is one of the well-established metal additive manufacturing technologies in the market. Insights into the variability of melt pool dimensions are crucial to determine process parameters for process optimization and enhancement of mechanical properties. Specifically, melt pool dimensional variability can lead to lack-of-fusion type flaws. In the present work, we analyze the variation in melt pool dimensions by utilization of ultra-high-speed imaging at a rate of up to 200,000 frames per second. Quantification of melt pool variation for the titanium alloy, Ti-6Al-4V, is performed with a variety of process parameters. Results from high-speed imaging are compared to direct measurements of bead widths from single bead experiments. Melt pool variability is presented across parameter space in a process map format. Results from high-speed imaging of block and component builds are also presented. |