Microstructure characterization of WC-9.2wt%Monel 400 fabricated using laser engineered net shaping using laser engineered net shaping

Davoren, BSacks, NTheron, Maritha2022-01-212022-01-212021-06Davoren, B., Sacks, N. & Theron, M. 2021. Microstructure characterization of WC-9.2wt%Monel 400 fabricated using laser engineered net shaping using laser engineered net shaping. Progress in Additive Manufacturing, 6. http://hdl.handle.net/10204/122152363-95122363-9520https://doi.org/10.1007/s40964-021-00203-4http://hdl.handle.net/10204/12215To assess if a WC-9.2wt%Monel 400 alloy properties could be improved using LENS, one alloy was deposited onto a heated substrate and a second alloy was subjected to laser remelting of the final deposited layer. Microstructural characterization was performed using XRD, FESEM, EPMA, and Raman spectroscopy. Multiple microstructures were observed with eutectic, fishbone, and Fe/W-rich dendrites present in the fusion zone at the substrate-alloy interface, while needle-like, triangular and blocky carbides were found in the central regions, with acicular microstructures in the surface region. The alloy deposited onto the heated substrate had less eutectic and more fishbone structures in the fusion region. The laser remelted surface layer had a more homogenous acicular structure with minimal binder pooling compared to the other alloys. The spheroidal, cast WC/W2C powder particles were found to have core-rim structures after laser sintering. These microstructural variations resulted in a gradient hardness profile from the substrate-alloy interface to the alloy surface. The surface hardness of the laser remelted alloy was found to be significantly higher compared to the other alloys.AbstractenAdditive manufacturingCemented tungsten carbidesLaser engineered net shapingMicrostructuresNickel alloysMicrostructure characterization of WC-9.2wt%Monel 400 fabricated using laser engineered net shaping using laser engineered net shapingArticleDavoren, B., Sacks, N., & Theron, M. (2021). Microstructure characterization of WC-9.2wt%Monel 400 fabricated using laser engineered net shaping using laser engineered net shaping. Progress in Additive Manufacturing, 6, http://hdl.handle.net/10204/12215Davoren, B, N Sacks, and Maritha Theron "Microstructure characterization of WC-9.2wt%Monel 400 fabricated using laser engineered net shaping using laser engineered net shaping." Progress in Additive Manufacturing, 6 (2021) http://hdl.handle.net/10204/12215Davoren B, Sacks N, Theron M. Microstructure characterization of WC-9.2wt%Monel 400 fabricated using laser engineered net shaping using laser engineered net shaping. Progress in Additive Manufacturing, 6. 2021; http://hdl.handle.net/10204/12215.TY - Article AU - Davoren, B AU - Sacks, N AU - Theron, Maritha AB - To assess if a WC-9.2wt%Monel 400 alloy properties could be improved using LENS, one alloy was deposited onto a heated substrate and a second alloy was subjected to laser remelting of the final deposited layer. Microstructural characterization was performed using XRD, FESEM, EPMA, and Raman spectroscopy. Multiple microstructures were observed with eutectic, fishbone, and Fe/W-rich dendrites present in the fusion zone at the substrate-alloy interface, while needle-like, triangular and blocky carbides were found in the central regions, with acicular microstructures in the surface region. The alloy deposited onto the heated substrate had less eutectic and more fishbone structures in the fusion region. The laser remelted surface layer had a more homogenous acicular structure with minimal binder pooling compared to the other alloys. The spheroidal, cast WC/W2C powder particles were found to have core-rim structures after laser sintering. These microstructural variations resulted in a gradient hardness profile from the substrate-alloy interface to the alloy surface. The surface hardness of the laser remelted alloy was found to be significantly higher compared to the other alloys. DA - 2021-06 DB - ResearchSpace DP - CSIR J1 - Progress in Additive Manufacturing, 6 KW - Additive manufacturing KW - Cemented tungsten carbides KW - Laser engineered net shaping KW - Microstructures KW - Nickel alloys LK - https://researchspace.csir.co.za PY - 2021 SM - 2363-9512 SM - 2363-9520 T1 - Microstructure characterization of WC-9.2wt%Monel 400 fabricated using laser engineered net shaping using laser engineered net shaping TI - Microstructure characterization of WC-9.2wt%Monel 400 fabricated using laser engineered net shaping using laser engineered net shaping UR - http://hdl.handle.net/10204/12215 ER -24853