ISSN: 1945-7553
CODEN: JTEVAB
Page Count: 6

Origin of Burst-Type Acoustic Emission in Unflawed 7075-T6 Aluminum

Bianchetti, R
Research assistant, University of California, Davis, Calif.

Hamstad, MA
Engineer, Lawrence Livermore Laboratory, Livermore, Calif.

Mukherjee, AK
Professor, University of California, Davis, Calif.

Abstract

Tensile tests were used to study the acoustic emission from several 7075-T6 aluminum plates. Specimens from one plate produced a large burst-type emission in addition to the continuous emission. Metallographic and fracture surface studies indicated that the burst-type emission resulted from the brittle fracture of large (20 to 60 μm) primary inclusions in the microstructure.

Keywords:
acoustic emission, aluminum, tension tests, inclusion particles

Paper ID: JTE10518J
DOI: 10.1520/JTE10518J
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