Direction dependency in coaxial laser double wire Direct Energy Deposition

Coaxial Laser wire Direct Energy Deposition (L-DED) promises a direction-independent buildup due to centric supply of the welding material. To fabricate Functionally Graded Materials (FGMs), processing head was designed that is capable supplying two materials into zone. This study investigates direction dependency seams produced by 1.4718 metal wires with diameter 0.8 mm in coaxial laser setup using three separately controllable single beams maximum combined power 660 W. The are supplied simultaneously spot under an incidence angle 3.5° middle axis head. seam geometry investigated confocal laserscanning-microscope. A comparison height, width and macroscopic reveals influence on quality Double (LD-DED).