Abstract
This research is part of a broader effort to develop a nondestructive evaluation technique to monitor radiation damage in reactor pressure vessel steels, the main contributor being copper-rich precipitates. In this work, 17-4PH stainless steel is thermally aged to study the effects of copper precipitates on the acoustic nonlinearity parameter. Nonlinear ultrasonic measurements using Rayleigh waves are performed on isothermally aged 17-4PH. Results showed a decrease in the acoustic nonlinearity parameter with increasing aging time, consistent with evidence of copper precipitation from hardness, thermo-electric power, transmission electron microscopy, and atom probe tomography measurements.
| Original language | English |
|---|---|
| Pages (from-to) | 8-15 |
| Number of pages | 8 |
| Journal | NDT and E International |
| Volume | 71 |
| DOIs | |
| State | Published - Apr 2015 |
Keywords
- Nonlinear
- Nonlinear ultrasonic methods
- Precipitate hardening
- Rayleigh waves
- Thermal embrittlement
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