Optimization of metallic powder filaments for additive manufacturing extrusion (MEX)

Abstract Additive manufacturing (AM) of metallic powder particles has been establishing itself as sustainable, whatever the technology selected. Material extrusion (MEX) integrates ongoing effort to improve AM sustainability, in which low-cost equipment is associated with a decrease waste during manufacturing. MEX gaining increasing interest for building 3D functional/structural parts because it incorporates consolidated knowledge from injection moulding/extrusion feedstocks into scope—filament layer-by-layer. Moreover, an indirect process can overcome some technical limitations direct processes (laser/electron-beam-based) regarding energy-matter interactions. The present study reveals optimal methodology produce filament (metallic powder, binder, and additives), having mind attain highest content. Nevertheless, main challenges are also achieve high extrudability suitable ratio between stiffness flexibility. volume content (vol.%) was evaluated by critical concentration (CPVC). Subsequently, rheology established means mixing torque value, related performance.