Process window development of DED-LB/M process with coaxial wire for stainless steel AISI 316L

This work is focused on the development of a process window for the laser-based directed energy deposition additive manufacturing (AM) process with coaxial wire as feedstock (DED-LB/M) as well as on the investigation of the significance of process parameters on the bead dimensions. This study employs a dual-pronged experimental approach: a one-factor-at-a-time (OFAT) evaluation for qualitative analysis of track dimensions and delineation of the process window, coupled with a full factorial design to derive response surfaces for AISI 316L stainless steel. The aim of this work is to identify the appropriate process parameters by examining the width, height and depth dimensions of the bead and the generation of process related knowledge so as to be used in further experimental work and for process control.