| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 6758471 | NDT & E International | 2014 | 10 Pages |
Abstract
Sub-surface cracks present difficulties for eddy current methods as the skin effect causes currents to flow preferentially near the surface. This work examines graphite as a case study for the qualitative assessment of sub-surface cracks and employs multi-frequency eddy current techniques. The research has particular relevance to Advanced Gas-Cooled Reactors (AGR׳s) as during their operation there is the potential for cracks to develop within moderator bricks. This work reports that subsurface slots of 18% brick thickness can be detected. This work confirms these results with a parametric 3D finite element study.
Related Topics
Physical Sciences and Engineering
Engineering
Civil and Structural Engineering
Authors
A.D. Fletcher, A.J. Peyton, D. Armitage, M. Brown, R. Chapman,