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Selected Works of Haijun Gong
Contribution to Book
Influences of Energy Density on Porosity and Microstructure of Selective Laser Melted 17-4PH Stainless Steel
Proceedings of the Solid Freeform Fabrication Symposium (2013)
  • Hengfeng Gu, University of Louisville
  • Haijun Gong, Georgia Southern University
  • Deepankar Pal, University of Louisville
  • Khalid Rafi, Nanyang Technological University, Singapore
  • Thomas Starr, University of Louisville
  • Brent Stucker, University of Louisville
Link
Abstract
Energy density, which directly impacts the properties of as-built parts, is a key factor in the metal selective laser melting (SLM) process. This paper studies the influences of energy density on porosity and microstructure of SLM 17-4PH stainless steel parts. Experiments were carried out by varying processing parameters to change energy density. Porosity was estimated using the Archimedes method and image analysis. Microstructures were investigated through optical and electron microscopy. The experimental results were discussed regarding porosity formation and microstructure characterization. 
Keywords
  • Influences,
  • Energy density,
  • Porosity,
  • Microstructure,
  • Selective laser melted,
  • 17-4PH stainless steel
Disciplines
Publication Date
August 16, 2013
Citation Information
Hengfeng Gu, Haijun Gong, Deepankar Pal, Khalid Rafi, et al.. "Influences of Energy Density on Porosity and Microstructure of Selective Laser Melted 17-4PH Stainless Steel" Austin, TXProceedings of the Solid Freeform Fabrication Symposium (2013) p. 474 - 489
Available at: http://works.bepress.com/haijun-gong/22/