From these processes and their combinations with others manufacturing processes, different technologies have been developed.ĪM advantages include the possibility to manufacture freeform complex components that would otherwise be impossible to build with subtractive manufacturing processes, and product customization and personalization by reducing mass, amount of assemblies, and material waste in order to improve the supply chain operability. According to that standard, AM is classified by seven general processes: material extrusion (ME), direct energy deposition (DED), material jetting (MJ), powder bed fusion (PBF), vat photopolymerization (VP), binder jetting (BJ), and sheet lamination (SL). These results lead to the formulation of a novel criterion that predicts the mechanical behavior of AM components.Īdditive manufacturing (AM) is defined by the standard ISO-ASTM 52900 as “the process of joining materials to make parts from 3D model data, usually layer upon layer, as opposed to subtractive manufacturing and formative manufacturing methodologies”. However, the angle between the main void axis and the mechanical load axis α shows a relation for FDM components: when its mean value μ(α) is around 80 (degrees) the yield strength and Young’s modulus are reduced. The results of this work demonstrate that void characteristics such as quantity, size, sphericity and compactness show no obvious variations between the samples. Furthermore, a relation between the tensile mechanical properties and digital void measurements is established. The aim of this work is an extended analysis of void shape by means of X-ray computed tomography (CT) applied to fused deposition modeling (FDM) samples. The build direction affects the mechanical properties of the built part, including voids of different characteristics. However, AM components have been evaluated by destructive and non-destructive testing and have shown mechanical issues, such as reduced resistance, anisotropy and voids. AM has multiple advantages over other construction techniques, such as freeform, customization, and waste reduction. Additive manufacturing (AM) is the term for a number of processes for joining materials to build physical components from a digital 3D model.
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