Volume 3, Issue 4 (April 2006)

    Effect of Sample Geometry on Regression Rate of the Melting Interface for Carbon Steel Burned in Oxygen

    (Received 21 October 2005; accepted 23 January 2006)

    CODEN: JAIOAD

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    Abstract

    Promoted-ignition testing on carbon steel rods of varying cross-sectional area and shape was performed in high pressure oxygen to assess the effect of sample geometry on the regression rate of the melting interface. Cylindrical and rectangular geometries and three different cross sections were tested and the regression rates of the cylinders were compared to the regression rates of the rectangular samples at test pressures around 6.9 MPa. Tests were recorded and video analysis used to determine the regression rate of the melting interface by a new method based on a drop cycle which was found to provide a good basis for statistical analysis and provide excellent agreement to the standard averaging methods used. Both geometries tested showed the typical trend of decreasing regression rate of the melting interface with increasing cross-sectional area; however, it was shown that the effect of geometry is more significant as the sample's cross sections become larger. Discussion is provided regarding the use of 3.2-mm square rods rather than 3.2-mm cylindrical rods within the standard ASTM test and any effect this may have on the observed regression rate of the melting interface.


    Author Information:

    Suvorovs, T
    Postgraduate Students, Faculty of Built Environment and Engineering, School of Engineering Systems, Queensland University of Technology, Gardens Point, QLD

    Ward, NR
    Postgraduate Students, Faculty of Built Environment and Engineering, School of Engineering Systems, Queensland University of Technology, Gardens Point, QLD

    Wilson, R
    Senior Lecturer, School of Mathematics, The University of Queensland, St. Lucia, QLD

    Steinberg, TA
    Senior Lecturer, Faculty of Built Environment and Engineering, School of Engineering Systems, Queensland University of Technology, Gardens Point, QLD


    Stock #: JAI13565

    ISSN: 1546-962X

    DOI: 10.1520/JAI13565

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    Author
    Title Effect of Sample Geometry on Regression Rate of the Melting Interface for Carbon Steel Burned in Oxygen
    Symposium Flammability and Sensitivity of Materials in Oxygen-Enriched Atmospheres, 2006-10-20
    Committee G04