Abstract
Characteristics of mechanical resonance are measured on powder iron samples with a porosity of 0.06 produced by die compaction and sintering at 573 to 1373 K. Young’s modulus and parameter CN that describes how the resonant frequency varies with increasing amplitude of oscillation are calculated. It is established that CN decreases with increasing temperature of sintering. Comparing the resonance characteristics with results from fracture toughness tests and structural analysis shows that CN correlates with fracture toughness and failure mode of samples. The results indicate that CN is related to the evolution of the interparticle boundaries and may be used as a highly sensitive criterion to quantitatively assess the quality of sintered powder materials.
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Translated from Poroshkovaya Metallurgiya, Vol. 47, No. 5–6 (461), pp. 128–137, 2008.
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Vdovichenko, A.V., Podrezov, Y.N. & Skorokhod, V.V. Mechanical resonance spectroscopy of interparticle boundaries in high-density iron powder compacts. Powder Metall Met Ceram 47, 366–372 (2008). https://doi.org/10.1007/s11106-008-9028-0
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DOI: https://doi.org/10.1007/s11106-008-9028-0