Additive Manufacturing of metal parts by solid-state 3D metal printing techniques

Organizer: Dr. Olaf Andersen

A large portion of the current research in additive manufacturing of metal parts deals with methods that use metal in the molten state to build up parts, i. e. selective laser or electron beam melting. In contrast, additive manufacturing techniques like ink jet printing, binder jetting, fused filament deposition or 3D screen printing can be used to produce green (unsintered) bodies of various shapes consisting of metal powder particles and a binder linking together these particles. In order to achieve fully metallic parts, a solvent or thermal debinding process is required that removes the organic constituents. Subsequently, the individual metal particles are joined by diffusion in the solid state (sintering) and a fully metallic part is achieved. These methods offer various opportunities for the shaping of parts including machining in the green state in order to improve the surface and feature details. On the other hand, specific challenges are encountered with regard to achievable geometrical features, material density as well as warping and distortion during the debinding and heat treatment steps. The symposium invites contributions addressing these topics including pre- and post-processing steps; it intends to present the current state-of-the-art of such solid-state techniques in order to provide deeper insight into their specific opportunities and limitations.