| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing of Ceramic-based Materials: Process Development, Materials, Process Optimization and Applications
|
| Presentation Title |
Modeling and Monitoring of Thermal Accumulation During Laser Powder Bed Fusion of Cemented Carbides |
| Author(s) |
Alexander Gourley, Edgar Mendoza, Reeja Jayan, Jack Beuth |
| On-Site Speaker (Planned) |
Alexander Gourley |
| Abstract Scope |
The goal of this research is to allow the fabrication of tall, complex geometries in the additive manufacturing (AM) of composite powders, including 17% Ni, WC. Cemented carbides exhibit unique properties, including abrasion resistance at high temperatures, but defects resulting from thermal accumulation limit the height and complexity of geometries that can be built by AM. In this work, variable layer cooling times and a variety of geometries are investigated to analyze their effects on thermal accumulation and diffusion. Pyrometers and IR thermal imaging are used to measure temperatures as a function of build height and to monitor overall heat build-up. Printed parts are used as samples for thermal conductivity measurements needed as inputs to melt pool scale process planning models. Varying layer times provide insight into the effects of relaxation time on temperature accumulation, which is used to avoid defects that become more prominent with part height. |