Relations of Hardness to Young's Modulus and Poisson's Ratio of Sintered Iron-Copper Materials

The quadratic equation in which Young's modulus is a function of porosity of sintered iron was applied to the experimental results of sintered Fe-Cu materials. Vickers hardness and Poisson's ratio were also described as the quadratic equation of porosity of sintered Fe-Cu materials. The experimental constants were affected by the type of Fe and Cu powders and sintering temperature. In comparison with Young's modulus against porosity, the relationship between hardness and porosity were affected by those factors. It was clarified that Young's modulus and Poisson's ratio can be described as a linear function of hardness in the case of sintered Fe-Cu materials at the porosity below 20%. Consequently, in the case that the linear relations of Young's modulus and Poisson's ratio to hardness for use powder and sintering condition are known, those can be calculated from the measured value of hardness.