Porosity is an inherent feature of additively manufactured components that impairs the mechanical properties. Since porosity depends not only on the process parameters but also on the component geometry, it is necessary to investigate this dependency. This study reveals relationships between porosity, process parameters and component geometry in AlSi10Mg specimens. Micro-computed tomography images of different geometries built with varying parameters were analysed for pore concentrations. The quantity and distribution of pores at overhangs depends on the laser scan speed and the width of the overhang. Similarly, the scan speed influences the effective bead width and thus the pore formation at thin structures. This relationship is revealed by an in-depth analysis of the laser path together with the μCT images. The investigations show that the process parameters can only be optimal for a specific geometry. The presented interdependencies can be used to derive locally adjusted scanning strategies and machine parameters.

孔隙率是增材制造部件的固有特征，会损害机械性能。由于孔隙率不仅取决于工艺参数，还取决于部件几何形状，因此有必要研究这种依赖性。该研究揭示了 AlSi10Mg 试样中孔隙率、工艺参数和部件几何形状之间的关系。分析了用不同参数构建的不同几何形状的显微计算机断层扫描图像的孔隙浓度。悬垂孔的数量和分布取决于激光扫描速度和悬垂宽度。同样，扫描速度会影响有效珠宽度，从而影响薄结构处的孔形成。通过对激光路径和 μCT 图像的深入分析揭示了这种关系。调查表明，工艺参数只能针对特定几何形状进行优化。所呈现的相互依赖性可用于导出本地调整的扫描策略和机器参数。