|About this Abstract
||MS&T23: Materials Science & Technology
||Additive Manufacturing of Ceramic-based Materials: Process Development, Materials, Process Optimization and Applications
||Laser Powder Bed Fusion of Tungsten Carbide-Nickel Geometries Leveraging Thermomechanical Modeling
||Alexander Gourley, Edgar Mendoza Jimenez, Reeja Jayan, Jack Beuth
|On-Site Speaker (Planned)
The combination of hardness, abrasion resistance, and fracture toughness make cemented carbides desirable for machining and tooling, but these properties limit achievable geometries when fabricating parts through traditional techniques. Laser powder bed fusion (LPBF) provides a fabrication pathway through which cemented carbide parts can be achieved with greater geometric freedom. Our lab explored various process parameter combinations with a tungsten carbide - 17wt% Ni agglomerated powder, but recoater blade collisions limited achievable geometries to 15 mm tall cylinders. Leveraging a commercially available thermomechanical modeling software, Netfabb, the effects of interlayer timing, parameter combinations, and geometric features on recoater clearance guided designs for two prints evaluating printing larger and taller parts with more geometric features. All parts were printed to completion except for a long geometry that delaminated from the build plate. the measured density and hardness values in the taller parts were similar to the previous 15 mm tall cylinders.