| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Equipment, Instrumentation and In-Situ Process Monitoring
|
| Presentation Title |
E-beam Spot Melt Process Mapping via High-Speed Two-Color Thermal Imaging |
| Author(s) |
Alexander J. Myers, William Frieden Templeton, Jonathan A. Malen, Sneha P. Narra, Jack L. Beuth |
| On-Site Speaker (Planned) |
Alexander J. Myers |
| Abstract Scope |
Due to its ability to produce high-speed beam deflection, electron beam powder bed fusion allows for a wider range of scan strategies. One such fill pattern, spot melting, fills regions of a layer with overlapping stationary melt pools. Within this fill pattern, a wide range of potential outcomes include cases where individual spots within a region solidify separately, islands of spots melt, solidifying together, or the entire region melts and solidifies. This talk will discuss some processing options within the spot melting parameter space and how exploration of those options is being aided by two-color thermal imaging. It is demonstrated that the two-color method can produce maps of surface temperatures obtained at both melt pool and area melting size scales ranging from roughly 100 microns to 5mm. Measured temperature fields are correlated with simulations to understand not only temperatures and cooling rates, but also fluid movement and solidified surface topology. |