TY - CONF A1 - Laumer, Tobias T1 - The influence of micro-sized structures on the compound strength of multi-material components built by Simultaneous Laser Beam Melting of Polymers T2 - Proceedings of LPM2016 - the 17th International Symposium on Laser Precision Microfabrication, 2016, Xian, China N2 - Simultaneous laser beam melting (SLBM) allows the direct realization of multi-material components consisting of different polymer materials by a single Additive Manufacturing (AM) process. To achieve a high compound strength between different materials by adhesive bonding, a common boundary zone based on diffusion of the macromolecules is necessary and thus, both materials needs to be compatible regarding their specific adhesion compatibility. However, by SLBM also incompatible polymers can be processed to multi-material parts. If two incompatible polymers are processed, a positive locking between the different materials is necessary to achieve a connection between the materials. The positive locking results of a random mixture process of the different powder materials during the powder deposition process by a two chamber recoater system, which leads to the forming of undercuts of one material in the other during the melting and recrystallization. In this paper, thermoplastic elastomer (TPE) and polypropylene (PP) powders, which are incompatible, are processed to multi-material specimens. By qualifying basic material properties, their influence on the process and especially on the forming of undercuts in the boundary zone is analyzed. To also allow the analysis of the influence of both material and process parameters on the resulting part properties, tensile test specimens are built and their tensile strength is determined. Additionally, cross sections of the boundary zone are prepared and analyzed by microscope images. KW - 3D printing KW - additive manufacturing KW - multi-material parts KW - powder material qualification KW - selective laser beam melting of polymers Y1 - 2016 UR - https://opus4.kobv.de/opus4-oth-regensburg/frontdoor/index/index/docId/4127 UR - https://www.researchgate.net/publication/304199990_The_influence_of_micro-sized_structures_on_the_compound_strength_of_multi-material_components_built_by_Simultaneous_Laser_Beam_Melting_of_Polymers ER -