Accession Number : AD0274484

Title :   ACOUSTIC EMISSION UNDER APPLIED STRESS

Corporate Author : LESSELLS AND ASSOCIATES INC BOSTON MASS

Personal Author(s) : SCHOFIELD,B.H.

Report Date : DEC 1961

Pagination or Media Count : 1

Abstract : Studies of the acoustic emission phenomenon of metals are discussed. The general nature of the emission of materials is presented, but primary emphasis is placed on the behavior of the phenomenon in various crystallographic orientations of both zinc and aluminum single crystals; the intent of the investigations being the determination of the source of the emitted sounds. The results are examined and interpreted in the light of fundamental deformation mechanisms, i.e., dislocations, and the particular manner in which they may induce such emission. All experiments were conducted under tensile loading of the specimens. Descriptions of the equipment, testing and analysis techniques, and findings with interpretation are presented in detail. (Author)

Descriptors :   *ACOUSTICS, *DEFORMATION, *SINGLE CRYSTALS, ALUMINUM, MEASUREMENT, STRESSES, WAVE PROPAGATION

Distribution Statement : APPROVED FOR PUBLIC RELEASE