Selective Laser Melting (SLM) and Electron Beam Additive Manufacturing (EBAM) are two of the most promising additive manufacturing technologies that can make full density metallic components using layer-by-layer fabrication methods. In this study, three-dimensional computational fluid dynamics models with Ti-6Al-4V powder were developed to conduct numerical simulations of both the SLM and EBAM processes. A moving conical volumetric heat source with Gaussian distribution and temperature-dependent thermal properties were incorporated in the thermal modeling of both processes. The melt-pool geometry and its thermal behavior were investigated numerically and results for temperature profile, cooling rate, variation in specific heat, density, thermal conductivity, and enthalpy were obtained with similar heat source specifications. Results obtained from the two models at the same maximum temperature of the melt pool were then compared to describe their deterministic features to be considered for industrial applications. Validation of the modeling was performed by comparing the EBAM simulation results with the EBAM experimental results for melt pool geometry.
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ASME 2018 International Mechanical Engineering Congress and Exposition
November 9–15, 2018
Pittsburgh, Pennsylvania, USA
Conference Sponsors:
- ASME
ISBN:
978-0-7918-5200-2
PROCEEDINGS PAPER
A Comparative Study Between Selective Laser Melting and Electron Beam Additive Manufacturing Based on Thermal Modeling
M. Shafiqur Rahman,
M. Shafiqur Rahman
University of New Orleans, New Orleans, LA
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Paul J. Schilling,
Paul J. Schilling
University of New Orleans, New Orleans, LA
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Paul D. Herrington,
Paul D. Herrington
University of New Orleans, New Orleans, LA
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Uttam K. Chakravarty
Uttam K. Chakravarty
University of New Orleans, New Orleans, LA
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M. Shafiqur Rahman
University of New Orleans, New Orleans, LA
Paul J. Schilling
University of New Orleans, New Orleans, LA
Paul D. Herrington
University of New Orleans, New Orleans, LA
Uttam K. Chakravarty
University of New Orleans, New Orleans, LA
Paper No:
IMECE2018-86428, V001T03A015; 13 pages
Published Online:
January 15, 2019
Citation
Rahman, MS, Schilling, PJ, Herrington, PD, & Chakravarty, UK. "A Comparative Study Between Selective Laser Melting and Electron Beam Additive Manufacturing Based on Thermal Modeling." Proceedings of the ASME 2018 International Mechanical Engineering Congress and Exposition. Volume 1: Advances in Aerospace Technology. Pittsburgh, Pennsylvania, USA. November 9–15, 2018. V001T03A015. ASME. https://doi.org/10.1115/IMECE2018-86428
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