The realization of space-resolved multi-material structures in laser powder bed fusion of metals (PBF-LB/M) is constrained by the limited capability of conventional systems to introduce secondary materials at defined locations within a build. Here, a machine integrated micro-dosing system for the deposition of secondary powders during the additive manufacturing process is introduced, that allows a controlled placement of small powder quantities providing flexibility in spatial resolution and deposited mass. Experiments show the capability of the system using Inconel 718 as base material and Maraging Steel as secondary powder. The approach enables the fabrication of functionally integrated components for various applications.
Möhring et al. (2026) studied this question.