STP600

    Comparison of Inclusion Distributions on Fracture Surfaces and in the Bulk of Carbon-Manganese Weldments

    Published: Jan 1976


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    Abstract

    Techniques are developed for determining the spatial and size distributions of spherical inclusions in mild steel. The relations between these distributions as found on electropolished surfaces and as found on fracture surfaces are determined. It is shown that the first neighbor spatial distributions on electropolished surfaces can be described analytically. The average dimple size on a fracture surface is always greater than the most probable first neighbor spacing. The inclusion size distributions both on electropolished and fracture surfaces are shown to be log-normal. The mean inclusion size on a fracture surface is always smaller than that on an electropolished surface. These variations are believed to arise from the nature of the fracture process.

    Keywords:

    fractography, inclusions, crack propagation, fractures (materials), fracture properties, carbon steels, geometric surfaces, weld metal, weldments, particle size distribution, particle density (concentration)


    Author Information:

    Passoja, DE
    Research scientist, Central Scientific Laboratory, and research supervisor, University Carbide Corporation, Tarrytown, N. Y.

    Hill, DC
    Research scientist, Central Scientific Laboratory, and research supervisor, University Carbide Corporation, Tarrytown, N. Y.


    Paper ID: STP29189S

    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP29189S


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