Investigating the surface roughness of 3D printed metal parts in case of thin 20 µm build layer thickness

In the case of the laser powder bed fusion technology of metals, the surface quality often does not meet the requirements for use. In addition, the surface can be characterized by different values on different surfaces of the part, depending on the preparation of the workpiece and the technology. The parameters affecting the surface roughness and their effect are also explored in the case of different raw materials and technological settings. In this research, the knowledge was expanded in the case of one of the thinnest layer thicknesses under various conditions. The effect of the angle of orientation during the preparation for the upskin and downskin surfaces of the component, in different directions on the surface of the components were determined in the case of titanium and stainless steel raw materials. In addition, the roughness-reducing effect of the shot peening process was also investigated. Graphical abstract