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The paper deals with the manufacturing of thin walls by various additive technologies. CMT- and microMAG-based WAAM (Wire Arc Additive Manufacturing) and LMD (Laser Metal Deposition) were selected as representatives to produce thin walls. Walls of AISI 316L (austenitic stainless steel) with a height of 100 mm were made by each of the above-mentioned technologies. The geometry and materials properties of the walls were analysed. Tensile strength of specimens, cut-off in the direction of the deposition and perpendicular to deposition direction as well were investigated. Higher tensile strength was observed in samples manufactured in deposition direction. Wall thickness and microhardness on the cross-section were measured. The microstructure was analysed with a light microscope in the unetched and etched stage. The narrowest wall was observed in the case of LMD due to lower heat input. Application of LMD resulted in formation of fine dendritic microstructure. Furthermore, the amount of delta-ferrite was lower in comparison to WAAM deposited walls.
Keywords: Additive manufacturing, stainless steel, laser metal deposition, WAAM, thin walls.© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.