Abstract:The lattice-structured porous Ni-Fe alloys with high porosity (95-98%) were processed using electrodeposition coupled with additive manufacturing technology. Two types of lattice structural models were designed, namely tetrahedral and simple cubic. It was found that reducing the strut length or increasing the strut diameter and the inclination angle of struts relative to the horizontal direction significantly enhanced the specific surface area of the lattice structures. The influence of electrodeposition parameters on the macroscopic morphology and structural characteristics of the porous Ni-Fe alloys was analyzed. The optimal electrodeposition conditions were determined as follows: cathode current density of 2-3 A.dm-2, deposition temperature of 50-60℃, electrolyte pH of 3 and deposition time of 1 h. Under such condition, both tetrahedral and simple cubic porous Ni-Fe alloys were prepared. The uniaxial quasi-static compression tests demonstrated that the yield strength of the tetrahedral porous Ni-Fe alloy reached 45.3 MPa, which is 12.4% higher than that of the simple cubic structure. Finite element simulation results indicated that the stress under compressive loading was concentrated in the nodal regions of the alloys with these two lattice structures. The stress concentration was the main cause for the local deformation and fracture.