Influence of Structural Parameters on Tensile Property of Gasar Porous Copper

Abstract Gasar porous copper with various structural parameters was made by metal-gas eutectic unidirectional solidification process. The effects of structure parameters on the uniaxial tensile properties of the porous copper were investigated. The fracture morphologies of tensile samples were studied by scanning electron microscope (SEM). Math models and numerical simulation were performed and confirmed by experimental data. Results show that the tensile properties of porous copper depend on porosity and tensile direction. Ultimate tensile strength of samples with the same porosity whose pore axes are parallel to tensile direction is better than that whose pore axes are perpendicular to tensile direction. For the porous copper whose pore axes are parallel to tensile direction, the ultimate tensile strength decreases linearly with increasing of the porosity, indicating that pores have no stress concentration on matrix. While for the porous copper whose pore axes are perpendicular to tensile direction, the ultimate tensile strength decreases significantly as porosity increases. Ultimate tensile strengths from experiments, models and numerical simulations of two kinds of specimens are consistent well.