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Heat Transfer in Additive Manufacturing of Glass

[+] Author Affiliations
Junjie Luo, John M. Hostetler, Douglas A. Bristow, Robert G. Landers, Edward C. Kinzel

Missouri University of Science and Technology, Rolla, MO

Jonathan T. Goldstein

Air Force Research Laboratory, Wright-Patterson AFB, OH

Paper No. HT2017-5100, pp. V002T16A002; 5 pages
doi:10.1115/HT2017-5100
From:
  • ASME 2017 Heat Transfer Summer Conference
  • Volume 2: Heat Transfer Equipment; Heat Transfer in Multiphase Systems; Heat Transfer Under Extreme Conditions; Nanoscale Transport Phenomena; Theory and Fundamental Research in Heat Transfer; Thermophysical Properties; Transport Phenomena in Materials Processing and Manufacturing
  • Bellevue, Washington, USA, July 9–12, 2017
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 978-0-7918-5789-2
  • Copyright © 2017 by ASME

abstract

The temperature in the molten region is a critical parameter for Additive Manufacturing (AM) of transparent glass using a laser heated filament-fed processing. This paper presents a study of the heat transfer in single track printing of borosilicate glass using the filament-fed process. The incandescent radiation emitted from the melt pool is monitored using a spectrometer. The spectral data indicates the breakdown of materials occurring inside of the glass, and reflects the occurrence of bubble formation due to reboil at high temperatures. A simple numerical model of the filament-fed process based on an energy balance within the melt pool is used to estimate the temperature. By combining the numerical and experimental results, the estimated temperature calculated from this model is suitable for control feedback.

Copyright © 2017 by ASME

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