Additive Manufacturing Defects: Causes and Mitigation скачать в хорошем качестве

Additive Manufacturing Defects: Causes and Mitigation

overview of common additive manufacturing (AM) defects, such as porosity, laminar fractures, and poor surface bonding, which significantly compromise the mechanical and aesthetic properties of finished parts. Various studies confirm these issues across different materials, noting that polymer AM parts can suffer from subsurface degradation leading to surface softening and crack initiation, while metallic AM parts exhibit microstructural heterogeneity and microvoids that increase wear rates and reduce strength. Specifically, research highlights that the AM process's inherent thermal cycles and layer-by-layer inconsistencies exacerbate issues like surface roughness, crack formation, and tool wear during post-processing. Mitigation strategies, including laser polishing and heat treatments, have proven effective in reducing these defects by improving surface hardness and lowering porosity. Overall, the text stresses that manufacturing-induced defects necessitate comprehensive mitigation to ensure the production of durable, aesthetically acceptable AM products, including dental restorations.