SEDL / STP / STP505-EB / STP35380S

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

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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.