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Laves Phase In Inconel 718. In this study post-heat treatment was used to regulate the morphology and size of the Laves phase in Inconel 718 fabricated using laser directed energy deposition. 1 the proeutectic y reaction at about 1360C 2 the yMC eutectic reaction at about 1290C 3 the yLaves phase eutectic reaction at about 1160C 4 the 6 phase. In order to investigate effectiveness of laser remelting LR technology on suppressing the formation of Laves phase different laser scanning speeds of the LR process were adopted to build and remelt the single-pass cladding layers. It can be found that plenty of short-needle δ phases distributed around the Laves phase.
It can be found that plenty of short-needle δ phases distributed around the Laves phase. Laves phase in Inconel 718 alloy is an unavoidable terminal solidification phase and its formation is strongly depended on solidification conditions. Download high-res image 277KB Download. Welds were produced in 2mm thick sheets by GTA welding process and subjected to the characterization. These second phase precipitates are typically generated during solidification5. The brittle phase Laves of Inconel 718 parts formed by laser metal deposition LMD represents a bottleneck of the engineering applications.
Of the diverse phases potentially present in Inconel 718 Laves phase has been generally accepted as being deleterious to the mechanical properties of the alloy.
The precipitate of the δ phase at 950 C after EMS-LSF can help to achieve the uniform diffusion of Nb and can also improve its. In order to investigate effectiveness of laser remelting LR technology on suppressing the formation of Laves phase different laser scanning speeds of the LR process were adopted to build and remelt the single-pass cladding layers. Abstract The mechanical properties of Inconel 718 are closely related to the morphology and size of the Laves phase which must be quantitatively controlled to change the effect of the Laves phase from deleterious to beneficial. Nickel base super alloy Inconel 718. It can be found that plenty of short-needle δ phases distributed around the Laves phase. The presence of Nb rich Laves phase in Inconel 718 weld fusion zones is known to be detrimental to weld mechanical properties.