Effect of silver addition in copper-silver alloys fabricated by laser powder bed fusion in situ alloying

Abstract In this study copper-silver (CuAg) structures with varying Ag content were fabricated by in situ alloying and Laser Powder Bed Fusion (L-PBF) Additive Manufacturing (AM). morphology, distribution elemental analysis conducted using Scanning Electron Microscopy (SEM) dynamic imaging for CuAg10, CuAg20 CuAg30 atomised powder. The resultant pore defect morphology each as built annealed CuAg alloy structure was investigated reported X-ray Computed Tomography (XCT) 3D visualisation. atomic crystal is through X-Ray Diffraction (XRD) analysis. Yield strength, Young’s Modulus, failure strain Ultimate Tensile Strength (UTS) of AM are sample fracture surfaces analysed SEM Energy Dispersive (EDX) techniques. Increased from CuAg10% to CuAg30% shown decrease the number defects 87% 83% samples average size decreasing 40% 9.5%. However, annealing process found increase porosity up 164%. Furthermore, resulted lattice contractions resulting increased yield Youngs Modulus CuAg30%.