9/13/2023 0 Comments Ph 7.18![]() Metal additive manufacturing (AM) is rapidly gaining adoption throughout engineering industries, with many research resources being directed at developing new methods and usable material types. 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. ![]() ![]() 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. For extrusion-based additive manufacturing methods, a significant decrease in tensile and fatigue strength is observed compared to specimens manufactured via SLM. They are compared to two 316L variants manufactured via selective laser melting (SLM) and literature results. 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. While tensile, bending, and shear properties of metals manufactured this way have been studied thoroughly, their fatigue properties remain unexplored. 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. The number of additive manufacturing methods and materials is growing rapidly, leaving gaps in the knowledge of specific material properties. ![]()
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