[T6] AM Beam Based Technologies

[15B-T6-21] Correlation between High Build Speed Process Parameters and Pore Characteristics of 316L Stainless Steel Manufactured by Powder Bed Fusion – Laser Beam

*R. Gunnerek¹, T. Mishurova², G. Bruno², E. Hryha¹ (1.Chalmers University of Technology, Sweden, 2.Bundesanstalt für Materialforschung und -prüfung (BAM), Germany)

キーワード：Productivity, Porosity, Additive Manufacturing, Powder Bed Fusion - Laser Beam

Low build speed is a challenge for wider industrial adoption of Powder Bed Fusion – Laser Beam as it is directly associated with higher production costs. The build speed can be efficiently increased by increasing processing parameters i.e. layer thickness, scan speed and hatch distance. This study investigates the impact of higher build speeds on pore characteristics. Increase in layer thickness by factor of 4 and 2.5 factor increase in hatch distance was investigated. Detailed pore characterization by light optical microscopy combined with image analysis and Synchrotron X-ray Computed Tomography (SXCT) on selected samples indicated that pore distribution and characteristics can be tailored by change in the process parameters.