###### Abstract
These high costs can arise from the production of special dies and become amortized only with increasing batch sizes, making individual productions or small series economically inefficient [9]. Particularly for small batch sizes, additive manufacturing (AM) provides an economical solution with which complex parts can be created. Depending on the individual case, the production can not only be more cost effective but also result in shorter cycle times and less material consumption [10]. Responsible for this is the high design freedom in AM compared to conventional manufacturing [11]. This high design freedom offers great potential for lightweight design and has moved AM more into the focus of industry and research in recent years. Current research topics are dedicated to both further developments of manufacturing and material characterization and fundamental questions such as the application scope of AM or the optimal process parameters [12]. Another research focus is the consideration of the print direction in the design of AM parts, since anisotropic and/or locally varying material properties can arise within the parts [13]. In powder-based additive manufacturing processes, powder layers are applied incrementally and melted locally by a laser beam, in order to build up a part layer by layer [14]. Thereby, it is primarily the selected process parameters such as the scan strategy or the laser power that determine the final material properties of the manufactured part [15]. Such a scan strategy that is employed in selective laser melting (SLM) is divided into two steps: first the outer contour and then the inner volume are melted in each layer [14]. This scan strategy ensures high shape fidelity of the resulting part and is therefore frequently applied [11]. However, especially at economically relevant printing rates, this scan strategy can lead to the appearance of three areas with different porosity distributions which, in turn, influence the mechanical material properties in the printed part [13]. This effect was investigated for aluminum powder in the project \"SLM-Topo\" funded by the DFG [16]. Thereby, the \"Creator\" from Coherent served as a printer for this purpose. The selected process parameters can be found in Table 1.  
Figure 1 shows a sectional view (\(x\)-\(y\) plane) of the three investigated porous areas which were formed by the presented scan strategy and resulted from the used process parameters. Particularly in the so-called interface area, which occurs between the contour and hatching areas, pores appear more frequently. In comparison, there is a significantly lower number of pores in the hatching area and almost no pores in the contour area. The three areas occur exclusively in the layer planes (\(x\)-\(z\) plane) along the print direction (\(y\)-axis) (see Figure 1 left). The material properties of the AM part are thus directly dependent on its shape and the print direction. [PERSON] et al. [18] investigated an interrelation between manufacturing and design using the example of fiber-reinforced polymers. Depending on the respective part shape, there are different fiber orientations due to the manufacturing which, in turn, decisively determine the arising material properties. By considering the fiber orientations in an optimization process, it was possible to generate structures specifically adapted to the load case. The consideration of process boundary conditions and their effect on material parameters directly during modeling and optimization can thus provide a decisive advantage with regard to optimal material utilization in early development phases such as design finding. As previously described, AM is particularly suitable for the production of complex parts (e.g., the result of a topology optimization) that result due to multiaxial load cases. Considering the investigations of [PERSON] et al. [18], it can be assumed that the simulative consideration of the shape-dependent material properties of SLM in a topology optimization is beneficial for design finding.