Experimental observation of plastic deformation areas, using an acoustic microscope

Novel techniques are described for the observation of plastic deformation areas by using an acoustic microscope. On a test piece subjected to plastic deformation, an area was found that had an abnormal contrast in the crystal grain and a pointed end at the V notch. Calculation of the propagation vel...

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Bibliographic Details
Published in:IEEE transactions on ultrasonics, ferroelectrics, and frequency control ferroelectrics, and frequency control, 1989-03, Vol.36 (2), p.274-279
Main Authors: Ishikawa, I., Semba, T., Kanda, H., Katakura, K., Tani, Y., Sato, H.
Format: Article
Language:English
Subjects:
Acoustic materials
Acoustic measurements
Acoustic testing
Acoustic waves
Acoustics
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Instruments
Microscopy
Physics
Plastics
Strain measurement
Stress measurement
Surface acoustic waves
Ultrasonics, quantum acoustics, and physical effects of sound
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Summary:Novel techniques are described for the observation of plastic deformation areas by using an acoustic microscope. On a test piece subjected to plastic deformation, an area was found that had an abnormal contrast in the crystal grain and a pointed end at the V notch. Calculation of the propagation velocity of the surface acoustic wave (SAW) showed a difference of several percent between this area and the rest of the test piece. It has been presumed that this difference reflects the local plastic deformation, and that the abnormal contrast area corresponds to the image of the two-dimensionally distributed plastic deformation area of metals.< >
ISSN:0885-3010
1525-8955
DOI:10.1109/58.19161