TY - JOUR A1 - Kedziora, Slawomir A1 - Decker, Thierry A1 - Museyibov, Elvin A1 - Morbach, Julian A1 - Hohmann, Steven A1 - Huwer, Adrian A1 - Wahl, Michael T1 - Strength properties of 316L and 17-4 PH stainless steel produced with additive manufacturing T2 - Materials N2 - The number of additive manufacturing methods and materials is growing rapidly, leaving gaps in the knowledge of specific material properties. A relatively recent addition is the metal-filled filament to be printed similarly to the fused filament fabrication (FFF) technology used for plastic materials, but with additional debinding and sintering steps. While tensile, bending, and shear properties of metals manufactured this way have been studied thoroughly, their fatigue properties remain unexplored. Thus, the paper aims to determine the tensile, fatigue, and impact strengths of Markforged 17-4 PH and BASF Ultrafuse 316L stainless steel to answer whether the metal FFF can be used for structural parts safely with the current state of technology. They are compared to two 316L variants manufactured via selective laser melting (SLM) and literature results. For extrusion-based additive manufacturing methods, a significant decrease in tensile and fatigue strength is observed compared to specimens manufactured via SLM. Defects created during the extrusion and by the pathing scheme, causing a rough surface and internal voids to act as local stress risers, handle the strength decrease. The findings cast doubt on whether the metal FFF technique can be safely used for structural components; therefore, further developments are needed to reduce internal material defects. KW - additive manufacturing KW - Charpy impact energy KW - fatigue properties KW - tensile strength KW - BASF Ultrafuse KW - Markforged KW - Rapid Prototyping KW - Fused Deposition Modeling KW - Selektives Laserschmelzen KW - Materialermüdung KW - Festigkeit Y1 - 2022 UR - https://hst.opus.hbz-nrw.de/frontdoor/index/index/docId/241 UR - https://nbn-resolving.org/urn:nbn:de:hbz:tr5-2411 VL - 15 IS - 18 SP - 1 EP - 26 PB - MDPI ER -