2026/01/01 by Lars Bachert, Jacques Platz, Jan C. Aurich
Engineering · #Additive Manufacturing Materials and Processes #High Entropy Alloys Studies #Welding Techniques and Residual Stresses
paper · doi:10.1016/j.cirp.2026.04.023
This study demonstrates continuous chemical grading of 316L and 17-4PH stainless steels within a single welding track in laser-based Directed Energy Deposition (DED-LB) by exploiting the transition between two powders. Transition- and response times of the powder flows were experimentally determined and incorporated into path planning to achieve grading within a single welding track. In-track gradients were confirmed by energy-dispersive spectroscopy (EDS) and hardness profiles. Relative densities above 99 % were achieved. The results demonstrate that in-track grading is reproducible without hardware modification and transition times scale proportionally with feeder rotation speed while response time remains nearly equal.