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http://dx.doi.org/10.14775/ksmpe.2020.19.08.056

A Study on the Heat Transfer Characteristics of Single Bead Deposition of Inconel 718 Superalloy on S45C Structural Steel Using a DMT Process  

Lee, Kwang-Kyu (School of Mechanical Engineering, Chosun UNIV.)
Ahn, Dong-Gyu (School of Mechanical Engineering, Chosun UNIV.)
Kim, Woo-Sung (Extreme Fabrication Technology Group, Daegyeong Regional Div., Korea Institute of Industrial Technology)
Lee, Ho-Jin (Extreme Fabrication Technology Group, Daegyeong Regional Div., Korea Institute of Industrial Technology)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.19, no.8, 2020 , pp. 56-63 More about this Journal
Abstract
The heat transfer phenomenon in the vicinity of the irradiated region of a focused laser beam of a DMT process greatly affects both the deposition characteristics of powders on a substrate and the properties of the deposited region. The goal of this paper is to investigate the heat transfer characteristics of a single bead deposition of Inconel 718 powders on S45C structural steel using a laser-aided direct metal tooling (DMT) process. The finite element analysis (FEA) model with a Gaussian volumetric heat flux is developed to simulate a three-dimensional transient heat transfer phenomenon. The cross-section of the bead for the FEA is estimated with an equivalent area method using experimental results. Through the comparison of the results of the experiments and those of the analysis, the effective beam radius of the bottom region of the volumetric heat flux and the efficiency of the heat flux model for different powers and travel speeds of the laser are predicted. From the results of the FEA, the influence of the power and the travel speed of the laser on the creation of a steady-state heat transfer region and the formation of the heat-affected zone (HAZ) in the substrate are investigated.
Keywords
Heat Transfer Characteristics; Single Bead; DMT Process; Inconel 718 Superalloy; S45C Structural Steel;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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