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- W2890420547 abstract "Electron beam melting (EBM) is one of the most widely used additive manufacturing (AM) methods for metallic components and has demonstrated great potential to fabricate high-end components in the aerospace and energy industries. The thermal condition within a melt pool and the complicated thermal cycles during the EBM process are of interest but not yet well-understood, and will significantly affect the microstructural homogeneity of as-manufactured nickel-base superalloy components. To establish the thermal profile evolution during electron beam melting of nickel-base superalloys, Inconel 718 (IN718) is manufactured and characterized in the as-manufactured condition, on account of its representative segregation and precipitation behaviours. The microstructure gradient within a build, specifically the Laves phase volume fraction evolution, is rationalized with the solidification condition and the following in-situ annealing. Precipitations of carbide/nitride/carbonitride, δ and γ′/γ′′ are also discussed. Hardness is measured and correlated to the Laves phase volume fraction evolution and the precipitation of γ′/γ′′. The results of this study will (i) shed light on microstructure evolution during the EBM process with regard to thermal history; and (ii) deepen the current understandings of solidification metallurgy for additive manufacturing of Ni-base superalloys." @default.
- W2890420547 created "2018-09-27" @default.
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- W2890420547 date "2018-12-01" @default.
- W2890420547 modified "2023-10-16" @default.
- W2890420547 title "On the formation of microstructural gradients in a nickel-base superalloy during electron beam melting" @default.
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- W2890420547 doi "https://doi.org/10.1016/j.matdes.2018.09.006" @default.
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