Abstract
We compare remote field eddy current testing and low-frequency eddy current testing from the viewpoint of sensitivity to back-side grooves in a metal plate. We carry out experiments using three metal plates with different depths of artificial grooves. A U-shape magnetic shield gives rise to a remote field eddy current as occurs in pipe inspection. The experiments show that the two methods have almost the same sensitivity to back-side grooves if a relatively low frequency and relatively far coil interval are used, which is also validated by three-dimensional finite-element simulations. We conduct numerical investigations to find the reason for this condition.
| Original language | English |
|---|---|
| Pages (from-to) | 90-95 |
| Number of pages | 6 |
| Journal | Materials Transactions |
| Volume | 54 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2013 |
Keywords
- Depth of penetration
- Eddy currents
- Electromagnetic nondestructive evaluation
- Finite element simulation
- Metal plate
- Sensitivity
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering