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Investigation of Multi-bead Deposition Characteristics of Inconel 718 Using DED Process
Kwang-Kyu Lee(이광규),Sung-Hoon Yim(임성훈),Dong-Gyu Ahn(안동규),Kang-Jae Lee(이강재),Du-Ry Kim(김두리),Ah-Jin Sim(심아진),Min-Kyung Park(박민경) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
The Directed energy deposition (DED) process uses a high-density energy source like laser to locally melt the substrate and deposition material and deposited it layer by layer. In order to manufacture products using the DED process, firstly must be considered the relationship of process parameters. In this study, investigation of multi-bead deposition characteristics according to laser power, scan speed, and hatch distance. The substrate and the powder materials are Inconel 718 superalloy. Through experimentation, deposited specimens were fabricated, and bead shape and dilution layer shape data were acquired through post-processing. The relationship between the heat history and the bead generation according to the process parameters was investigated using heat transfer analysis. As a result of the experiment and analysis, it was concluded that the hatch distance should be changed as the laser power and the scan speed to obtain a constant plane.