Abstract
In this paper Young’s modulus against porosity relation E/Eo = f(P) for sintered Fe and steel powder compacts is discussed. For the experiment beam like (5 × 10 × 50 mm3) compacts, in density range 6.6–7.0 g/cm3 (P = 0.12–0.09), prepared from Fe powder (ASC100.29) are sintered in industrial conditions. Elastic constants E, G, ν are calculated from experimentally obtained fundamental mode shape frequencies, specimen mass and dimensions, using impulse excitation technique (IET). To ensure free beam boundary conditions, supports are placed in mode shapes nodal points. Popular model equation is fitted to experimental data. A Bayesian approach is used for parameter estimation. Fitted model equation predicts reasonably well the data from our and another researchers experiments with pre-alloyed Fe-Cr-Mo powder compacts, but fails for sintered steels prepared from powder mixtures and diffusion alloyed powders with Cu additions.
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