Mechanical properties and microstructure of micro-electroformed nickel in fuze

The wide application of electroformed nickel in fuze leads to a research hotpot on its material mechanical properties. The objective of this work is to analyze the mechanical properties of electroformed nickel through analyzing its micro-structure. In this paper, uniaxial tensile tests and EBSD tests were conducted on three sets of electroformed nickel with average grain sizes below 1 um, and the mechanical properties and microstructures are obtained. To further study the effect of microstructure on the mechanical properties of electroformed nickel, simulations based on crystal plasticity finite element model are conducted. From experiments and simulations, the yield strength was found to be dependent of micro-electroformed nickel's grain size and texture, and the elastic modulus was found to be dependent of micro-electroformed nickel's texture. Both the texture intensity and texture type influence the elastic modulus and yield strength of micro-electroformed nickel.