Optimization of Process Parameters for Reentrant Surfaces in Direct Metal Laser Melting

One of the key factors for development and optimization of direct metal laser melting (DMLM) is the analysis of process parameters on reentrant build geometry and surface finish. Recent studies have focused on the optimization of standard build parameters with only minor emphasis on reentrant geometries. Parameters that are not optimized often contribute to poor surface finish, difficult to remove supports, and failed-to-build geometries of reentrant surfaces that limit the capabilities of DMLM. Through the analysis of multiple studies with varying process parameters and input scan path geometry, open loop methods for creation and control of reentrant build geometries are assessed and presented.