Additive Manufacturing of Ti-6Al-4V with laser-wire DED and local shielding gas protection
Procedia CIRP
Vol. 124
254-256
2024
Type: Zeitschriftenaufsatz (reviewed)
Abstract
Additive Manufacturing of titanium has the need of protecting the hot metal from atmospheric gases like oxygen using a shielding gas. The paper shows a possibility to realize this during laser-wire-DED with a local shielding gas stream and without the need of a chamber. A simple nozzle design together with a welding strategy of using short seams in the range of the nozzle diameter exhibits only minor discolorations. Tensile stress tests have been performed showing a significant deviation of the mechanical properties regarding the direction. The vertical results, which are perpendicular to the layer, are much better compared to the horizontal results in the layer plane. The vertical tests show an average of the tensile strength of 1215.8 N/mm² and an average elongation of 3.97\%.