[Kovove materialy - Metallic materials]
    Wed - November 13, 2024 - 19:39 No. of hits : 1798075 ISSN 1338-4252 (online) ISSN 0023-432X (printed)
© Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Bratislava, Slovak Republic

VOLUME 39 (2001), Issue 1

The effect of heterogeneous distribution of porosity on the flexural moduli of sintered iron bars
KUPKOVA, M., KUPKA, M., DUDROVA, E., DANNINGER, H., WEISS, B., KABATOVA, M., MELISOVA, D.
vol. 39 (2001), no. 1, pp. 20 - 30

Abstract
Bar shaped specimens were prepared from iron powder. The specimens possessed a quasilayered distribution of porosity with porous outer regions and more dense core. For such specimens, the effective flexural moduli determined by means of flexural vibration parallel to the quasilayers were systematically higher than those determined from vibrations perpendicular to the quasilayers. When the more porous surface regions were more or less removed by grinding, the difference between “parallel” and “perpendicular” moduli decreased or even vanished. Such effect of surface regions of less stiffness was also confirmed theoretically by calculating the relevant moduli for model bars with quasilayered distribution of porosity.

Key words
sintered iron, heterogeneous distribution of porosity, effective flexural modulus

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Full title of this journal is bilingual: Kovové materiály - Metallic Materials.
The official abbreviation in accordance with JCR ISI is Kovove Mater.


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