Abstract
High power acoustic excitation of components during a thermosonic (or Sonic IR) inspection may further propagate existing cracks. Monitoring such changes through destructive or non-destructive means is no trivial task. Process Compensated Resonance Testing (PCRT) technology offers the capability to
monitor the growth of fatigue-induced cracks (and other progressive defects) through statistical analysis of changes in a components resonant spectra over time. This technique can be used to detect changes in material properties
by comparing a components spectra to itself at regular intervals after systematic exposure to high power excitation associated with thermosonic inspection. In this work, the resonant spectra of 6 cracked and 6 uncracked turbine blades are captured prior to batch of inspections. Next, these spectra are analysed using proprietary software for changes in resonant behaviour. Results from this work
indicate that a typical thermosonic inspection of a turbine blade for crack detection does not cause crack propagation or degrade a blades structural integrity.
monitor the growth of fatigue-induced cracks (and other progressive defects) through statistical analysis of changes in a components resonant spectra over time. This technique can be used to detect changes in material properties
by comparing a components spectra to itself at regular intervals after systematic exposure to high power excitation associated with thermosonic inspection. In this work, the resonant spectra of 6 cracked and 6 uncracked turbine blades are captured prior to batch of inspections. Next, these spectra are analysed using proprietary software for changes in resonant behaviour. Results from this work
indicate that a typical thermosonic inspection of a turbine blade for crack detection does not cause crack propagation or degrade a blades structural integrity.
| Original language | English |
|---|---|
| Title of host publication | REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION |
| Pages | 1654 |
| Volume | 29 |
| Publication status | Published - Feb 2010 |
| Event | Review of Progress in Quantitative NDE - Kingston, Rhode Island, United States Duration: 26 Jul 2009 → 31 Jul 2009 |
Conference
| Conference | Review of Progress in Quantitative NDE |
|---|---|
| Country/Territory | United States |
| City | Kingston, Rhode Island |
| Period | 26/07/09 → 31/07/09 |
Keywords
- crack propagation
- turbine blades
- thermosonic inspection
- high power acoustic excitation
- process compensated resonance testing
- fatigue-induced cracks
- resonant behaviour