STP645

    Fractographic Analysis of Ceramics

    Published: Jan 1978


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    Abstract

    The development of fracture surface observations into a quantitative tool for analysis of brittle fracture is reviewed. The effect of temperature, strain rate, and residual stresses on the “mirror constant,” A, is discussed through recent experimental results, as well as new analysis of established literature. The current theories of mirror formation in glasses, glass ceramics, single crystals, and polycrystalline ceramics are compared to the results of a number of investigators. The relationship of the mirror constant to fracture toughness, that is, KIc, is discussed. Methods to incorporate the effects of grain size and internal stress on fracture are demonstrated. Finally, application of fracture surface analysis to scientific and applied problems are enumerated.

    Keywords:

    fractography, fracture surface analysis, ceramics, fractures (materials), brittle materials, mechanical properties


    Author Information:

    Mecholsky, JJ
    Research ceramic engineer, supervisory research engineer, and supervisory research ceramic engineer, Naval Research Laboratory, Washington, D.C.

    Freiman, SW
    Research ceramic engineer, supervisory research engineer, and supervisory research ceramic engineer, Naval Research Laboratory, Washington, D.C.

    Rice, RW
    Research ceramic engineer, supervisory research engineer, and supervisory research ceramic engineer, Naval Research Laboratory, Washington, D.C.


    Paper ID: STP38101S

    Committee/Subcommittee: E08.03

    DOI: 10.1520/STP38101S


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