STP505: Acoustic Emission Testing and Microcracking Processes

    Tetelman, AS
    School of Engineering and Applied Science, University of California, Los Angeles, Calif.

    Chow, R
    School of Engineering and Applied Science, University of California, Los Angeles, Calif.

    Pages: 11    Published: Jan 1972


    Abstract

    The various stages of microcrack initiation, microcrack growth, and final fracture are reviewed and the relation between their processes and acoustic emission is discussed. A theoretical model relating acoustic emission to the microcrack density of low carbon steel is presented, based upon experimental results of the microcrack density in low carbon iron. The model predicts that the total number of acoustic emissions increases rapidly with applied stress, above a threshold value.

    Keywords:

    acoustics, emission, cracking (fracturing), crack propagation, crack initiation, fractures (materials), stresses, grain boundaries, shear stress, dislocations (materials), plastic deformation, failure


    Paper ID: STP35380S

    Committee/Subcommittee: E07.04

    DOI: 10.1520/STP35380S


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