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- W3048509256 abstract "Abstract This study investigates the mechanism driving the formation of core-shell carbides during laser metal deposition (LMD). The interaction between CFs and 316L metal powder under laser irradiation results in the formation of new composite materials (316L/CFs) because of two-phase (solid-liquid) melting. 316L/CFs comprise a metal matrix with M7C3 and M23C6 carbides. The metal matrix also contains raw 316L powder particles. The composites thus obtained (316L/CFs) were characterized using X-ray diffraction (XRD), optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), electron backscatter diffraction (EBSD), and microhardness studies. The characterization revealed an in-situ transformation of M7C3 carbides to M23C6, which either occurs completely or ceases during transition stages resulting in the formation of core-shell carbides. The morphological analysis illustrates that primary carbides are of core-shell types with a single-crystal lattice. Moreover, the heat treatment can be used for the coalescence, coagulation, and partial dissolution of eutectic M23C6 carbides. It was observed that the morphology of eutectic and prime carbides are altered during the heat treatment at 1050 °C (4 h) and smooth cooling to 350 °C (11 h). Thus, the transformation of Cr7C3 (skeletal) → Cr23C6 (skeletal) → Cr23C6 (globular) occurs. Furthermore, the characterization of heat-treated samples confirms the core-shell nature of carbides. On the other hand, the core microhardness decreased by 1.5 times compared to that of the shell." @default.
- W3048509256 created "2020-08-18" @default.
- W3048509256 creator A5076851749 @default.
- W3048509256 date "2020-11-01" @default.
- W3048509256 modified "2023-10-01" @default.
- W3048509256 title "Investigation of M7C3, M23C6 and M3C carbides synthesized on austenitic stainless steel and carbon fibers using laser metal deposition" @default.
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- W3048509256 doi "https://doi.org/10.1016/j.surfcoat.2020.126294" @default.
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