ACOUSTIC EMISSION TESTING OF UNFLAWED 7075-T6 ALUMINUM

Tensile tests were performed to study the differences in the continuous acoustic emission from 7075-T6 aluminum plates made by five manufactures. The grain structures and the chemical compositions of these plates were determined. Results are given on a sixth plate, which emitted burst-type acoustic emission super-imposed on the continuous acoustic emission. The effect of orientation with respect to the rolling direction within a single plate was studied. Results from interrupted tensile tests are also reported; these tests were stopped at about 4.5% strain for different time periods before they were resumed. The tests indicate that acoustic emission is very sensitive to differences between plates of 7075-T6 aluminum that do not show up on a stress-strain curve. Further-more, the dislocation mechanisms that cause the continuous acoustic emission in this aluminum alloy are altered by room temperature, diffusion-based aging.

  • Corporate Authors:

    American Society for Testing and Materials

    100 Barr Harbor Drive, P.O. Box C700
    West Conshohocken, PA  United States  19428-2957
  • Authors:
    • Hamstad, M A
    • Mukherjee, A K
  • Publication Date: 1975-5

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00096263
  • Record Type: Publication
  • Report/Paper Numbers: Tech Note
  • Files: TRIS
  • Created Date: Jul 15 1975 12:00AM