|About this Abstract
||Materials Science & Technology 2020
||Additive Manufacturing of Ceramic-based Materials: Process Development, Materials, Process Optimization and Applications
||Manufacturing, Microstructure and Compressive Mechanical Properties of WC-12Co Cermet Material Fabricated by Direct Energy Deposition
||Kyoung-Wook Kim, Gi-Su Ham, Kee-Ahn Lee, Sun-Hong Park, Jung-Wook Cho
|On-Site Speaker (Planned)
WC-Co cermet material is difficult to cast due to its high melting point, and is not so easy to work to a complex shaped part. Additive manufacturing, which is capable of achieving near-net shapes, has been gaining a lot of attention recently. WC-12Co (wt.%) bulk material was fabricated using direct-energy deposition (DED), which is one of the additive manufacturing processes, and microstructure and compressive mechanical properties of WC-12Co materials were investigated. The DED built WC-12Co mainly composed of WC and Co, and minor Co3W3C and W2C phases were also detected. The porosity of WC-12Co materials was measured as 13.2%. The maximum compressive strength of DED built WC-12Co was obtained as 1.9GPa. Micro cracks were initiated at the microstructural defects (pore etc.) and propagated along the WC phase boundaries. Based on these results, the deformation mechanism of the WC-12Co fabricated by DED was also discussed in connection with microstructure.