Laser search peening for exfoliation corrosion detection
US6528763B1 · kind B1 · utility
23Cited by
17References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2001 |
| Grant date | Mar 4, 2003 |
| Priority date | — |
| Expiry date | May 23, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64F5/60
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An exfoliation corrosion detection method which enables rapid detection and evaluation of hidden exfoliation corrosion on aircraft with related cost savings. Pressure exerted on the surface by the laser created plasma generates a pressure pulse or shock wave that propagates into the part. When the stress in the shock wave is above the dynamic elastic limit of the material, the surface material yields plastically. This plastic strain creates compressive residual stresses in the surface, thereby enabling detection of exfoliation corrosion, if present.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.