Abstract
An electromagnetic acoustic transducer(EMAT) is a non-contact transducer which can transmit the ultrasonic guided waves into specimens without couplant. And it can easily generate specific guided waves such as SH(shear horizontal) or Lamb waves by altering the design of coil and magnet. In this study, the SH wave, which is generated by EMAT, has been applied to estimate the thickness-reduction in a steel plate. Especially, the interesting feature of the dispersive behavior in selected wave modes is used to detect the thickness-reduction. Experimental results show that the reduction-level can be quantified by the measurement of the group velocity of the wave which passes though the thinning area.
| Translated title of the contribution | Evaluation of Thickness Reduction in Steel Plate by Using SH-EMATs |
|---|---|
| Original language | Korean |
| Pages (from-to) | 47-52 |
| Number of pages | 6 |
| Journal | 비파괴검사학회지 |
| Volume | 31 |
| Issue number | 1 |
| State | Published - Feb 2011 |