Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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A Study on the Heat Transfer Characteristics of Single Bead Deposition of Inconel 718 Superalloy on S45C Structural Steel Using a DMT Process

DMT 공정을 이용한 S45C 구조용강 위 Inconel 718 초합금 단일 비드 적층시 열전달 특성 분석에 관한 연구

  • 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)
  • 이광규 (조선대학교 기계공학과) ;
  • 안동규 (조선대학교 기계공학과) ;
  • 김우성 (한국생산기술연구원 대경본부 극한가공기술그룹) ;
  • 이호진 (한국생산기술연구원 대경본부 극한가공기술그룹)
  • Received : 2020.04.22
  • Accepted : 2020.06.28
  • Published : 2020.08.31
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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.

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References

  1. Ahn, D. G., "Direct Metal Additive Manufacturing Processes and Their Sustainable Applications for Green Technology: A Review," International Journal of Precision Engineering and Manufacturing-Green Technology, Vol. 3, No. 4, pp. 381-395, 2016. https://doi.org/10.1007/s40684-016-0048-9
  2. Dass, A. and Moridi, A., "State of the Art in Directed Energy Deposition: From Additive Manufacturing to Materials Design," Coatings, Vol. 9, No. 7, pp. 1-26, 2019.
  3. Dinda, G. P., Dasgupta, A. K. and Mazumder, J., "Laser aided direct metal deposition of Inconel 625 superalloy: Microstructural evolution and thermal stability," Materials Science and Engineering: A, Vol. 509, No. 16, pp. 98-104, 2019.
  4. Joseph, M. F., Shokrani, A., Stephen, T. N. and Dhokia,. V., "Hybrid additive and subtractive machine tools - Research and industrial developments," International Journal of Machine Tools and Manufacture, Vol. 101, No. 8, pp. 79-101, 2016. https://doi.org/10.1016/j.ijmachtools.2015.11.007
  5. Amine, T., Joseph, W. N. and Liou, N., "An investigation of the effect of direct metal deposition parameters on the characteristics of the deposited layers," Case Studies in Thermal Engineering, Vol. 3, pp. 21-34, 2014. https://doi.org/10.1016/j.csite.2014.02.002
  6. Wang, L., Felicelli, S., Gooroochurn, T., Wang,P. T. and Horstemeyer, M. F., "Optimization of the LENS(R) process for steady molten pool size," Materials Science and Engineering: A, Vol. 474, No. 19, pp. 148-156, 2008. https://doi.org/10.1016/j.msea.2007.04.119
  7. Riqing, Y., John, E. S., Zheng, B., Zhou, Y. and Enrique, J. L., "Numerical modeling of the thermal behavior during the LENS(R) process," Materials Science and Engineering: A, Vol. 478, No. 7, pp. 47-53, 2006.
  8. Michaleris., P., "Modeling metal deposition in heat transfer analyses of additive manufacturing processes," Finite Elements in Analysis and Design, Vol. 86, No. 6, pp. 51-60, 2014. https://doi.org/10.1016/j.finel.2014.04.003
  9. Hofmeister, W., Griffith, M., Ensz, M. and Smugeresky, J., "Solidification in Direct Metal Deposition by LENS Processing," JOM, Vol. 53, No. 9, pp. 30-34, 2001. https://doi.org/10.1007/s11837-001-0066-z
  10. Peyre, P., Aubry, P., Fabbro, R., Neveu, R. and Longuet, A., "Analytical and Numerical Modelling of the Direct Metal Deposition Laser Process," Journal of Physics D: Applied Physics, Vol. 41, No. 2, pp. 1-10, 2008.
  11. Heigel, J. C., Michaleris, P. and Reutzel, E. W., "Thermo-mechanical Model Development and Validation of Directed Energy Deposition Additive Manufacturing of Ti-6Al-4V," Additive Manufacturing, Vol. 5, pp. 9-19, 2015. https://doi.org/10.1016/j.addma.2014.10.003
  12. Chua. B., Lee. H. J., Ahn. D. G. and Kim. J. G., "Investigation of Penetration Depth and Efficiency of Applied Heat Flux in a Directed Energy Deposition Process with Feeding of Ti-6Al-4V Wires," Journal of the Korean Society for Precision Engineering, Vol. 35, No. 2, pp. 211-217, 2018. https://doi.org/10.7736/kspe.2018.35.2.211