Effect of Porosity and Pore Size on the Elastic Moduli of Sintered Iron and Copper-Tin

The Young's modulus and shear modulus of iron and copper-tin sintered materials have been measured by the resonance method, with a view to determining the effects of porosity and pore size upon the values of the elastic moduli. The experimental values obtained were lower than those calculated on the basis of the Mackenzie theory. The discrepancy is attributed to a pore-size effect, since in the case of pores of sufficiently small dimensions the two results tend to coincide