Abstract:The lattice-structured porous Ni-Fe alloys with high porosity (95%?98%) were prepared by electrodeposition coupled with additive manufacturing technique. Two types of lattice-structured models were designed, namely tetrahedral structure and simple cubic. It is found that reducing the strut length or increasing the strut diameter and the inclination angle of struts relative to the horizontal direction significantly enhances 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 are 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 demonstrate that the yield strength of the tetrahedral porous Ni-Fe alloy reaches 22.91 MPa, which is 35.8% higher than that of the simple cubic structure. Finite element simulation results indicate that the stress under compressive loading is concentrated in the nodal regions of the alloys with both two lattice structures. The stress concentration is the main cause for the local deformation and fracture.