Browsing by Subject "energy density"

Now showing 1 - 2 of 2
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    Influences of Energy Density on Porosity and Microstructure of Selective Laser Melted 17- 4PH Stainless Steel
    (University of Texas at Austin, 2013) Gu, Hengfeng; Gong, Haijun; Pal, Deepankar; Rafi, Khalid; Starr, Thomas; Stucker, Brent
    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.
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    Measured Energy Densities for Polyamide 12 and Comparison of Values Calculated for Laser Sintering
    (University of Texas at Austin, 2016) Chalancon, Antoine; Bourell, David
    Energy density is a key factor in the Laser Sintering (LS) process, and impacts the properties of the built parts. Processing parameters have an important effect on Laser Sintering. This paper focuses on the evaluation of various energy density equations. Experiments were carried out by varying processing parameters, namely, laser power, scan speed, hatch distance/scan spacing and layer thickness to change actual and calculated energy density. Relative density was estimated using the Archimedes method and mensuration. As a result, a correlation between the laser energy density and the relative density has been established. Finally, the effect of parameters is discussed.