Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Material Characterization of Metal Parts Printed With Highly-Filled Polymers Fillaments: A Review
Submission Author:
Bruno Benegra Denadai , Buscando endereço... , Brazil
Co-Authors:
Bruno Benegra Denadai , Jean fernando farias, Felipe Di Nisio, Rodrigo Lupinacci Villanova, Neri Volpato, Lucas Freitas Berti
Presenter: Felipe Di Nisio
doi://10.26678/ABCM.COBEM2023.COB2023-0669
Abstract
Researchers worldwide are utilizing Additive manufacturing (AM) to solve various problems, as it offers several benefits such as reduced material waste and fabrication time, increased design flexibility and options, and the ability to deal with geometric and material complexities that are not achievable with subtractive manufacturing methods. Among the different AM technologies, Material Extrusion (MEX) is one of the most versatile and widely used, typically applied with polymers. Recently, increasing attention has been given to MEX of highly-filled polymers (HP) with metal powder. This allows low-cost conventional polymer 3D printers, with minor modifications, to fabricate parts of different kinds of metals. Studies have clearly stated the benefits of metal MEX technology, but the process has some limitations, and understanding them is critical to designing a part manufactured by this procedure. Since this AM technique involves using a filament containing organic components, post-processing steps are necessary to eliminate all traces of organic material to obtain the final metallic part. These processes cause shrinkage from 14% to 23% of the total part volume, depending on printing orientation and material, which needs to be carefully compensated on the CAD model to acquire the required dimensions. The final parts' integrity is highly dependent on the filament deposition pathway, and residual stresses can distort or even crack the parts after the sintering process. Porosity and effects on mechanical properties are also consequences of the post-processing steps. Metal MEX parts’ mechanical properties are usually lower when compared to Metal Injection molding (MIM) and other AM technologies, such as Selective Laser Melting (SLM). The present paper aims to review what has been studied about the characterization of materials produced by metal MEX, the most common mechanical tests, defects, and other particularities of the process has been researched over the last few years. This study contributes to the emerging field of metal MEX, highlighting the main techniques to evaluate the mechanical behavior of the final parts.
Keywords
metallic 3D printing, material characterization, Mechanical Properties, Metal Additive Manufacturing Process
