Nonlinear ultrasonic characterization of precipitation in 17-4PH stainless steel

Kathryn H. Matlack, Harrison A. Bradley, Sebastian Thiele, Jin Yeon Kim, James J. Wall, Hee Joon Jung, Jianmin Qu, Laurence J. Jacobs

Research output: Contribution to journalArticlepeer-review


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 languageEnglish (US)
Pages (from-to)8-15
Number of pages8
JournalNDT and E International
StatePublished - Apr 2015
Externally publishedYes


  • Nonlinear
  • Nonlinear ultrasonic methods
  • Precipitate hardening
  • Rayleigh waves
  • Thermal embrittlement

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanical Engineering


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