Experimental observation of plastic deformation areas, using an acoustic microscope

Author

Ishikawa, Isao ; Semba, Takuya ; Kanda, Hiroshi ; Katakura, Kageyoshi ; Tani, Yasuhiro ; Sato, Hisayoshi

Author_Institution

Hitachi Constr. Machinery Co. Ltd., Ibaraki, Japan

Volume

36

Issue

2

fYear

1989

fDate

3/1/1989 12:00:00 AM

Firstpage

274

Lastpage

279

Abstract

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.<>

Keywords

acoustic microscopy; plastic deformation; SAW; V notch; abnormal contrast area; acoustic microscope; crystal grain; metals; plastic deformation; propagation velocity; surface acoustic wave; Acoustic materials; Acoustic measurements; Acoustic testing; Acoustic waves; Instruments; Microscopy; Plastics; Strain measurement; Stress measurement; Surface acoustic waves;

fLanguage

English

Journal_Title

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on

Publisher

ieee

ISSN

0885-3010

Type

jour

DOI

10.1109/58.19161

Filename

19161