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Title: In-situ fatigue monitoring procedure using nonlinear ultrasonic surface waves considering the nonlinear effects in the measurement system

Abstract

Second harmonic generation using nonlinear ultrasonic waves have been shown to be an early indicator of possible fatigue damage in nuclear power plant components. This technique relies on measuring amplitudes, making it highly susceptible to variations in transducer coupling and instrumentation. This paper proposes an experimental procedure for in-situ surface wave nonlinear ultrasound measurements on specimen with permanently mounted transducers under high cycle fatigue loading without interrupting the experiment. It allows continuous monitoring and minimizes variation due to transducer coupling. Moreover, relations describing the effects of the measurement system nonlinearity including the effects of the material transfer function on the measured nonlinearity parameter are derived. An in-situ high cycle fatigue test was conducted using two 304 stainless steel specimens with two different excitation frequencies. A comprehensive analysis of the nonlinear sources, which result in variations in the measured nonlinearity parameters, was performed and the effects of the system nonlinearities are explained and identified. In both specimens, monotonic trend was observed in nonlinear parameter when the value of fundamental amplitude was not changing.

Authors:
 [1];  [1];  [1];  [2]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  2. Ajou Univ., Suwon (Korea, Republic of)
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE; Ministry of Trade, Industry and Energy (Korea, Republic of)
OSTI Identifier:
1512691
Report Number(s):
PNNL-SA-118962
Journal ID: ISSN 1738-5733
Grant/Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nuclear Engineering and Technology
Additional Journal Information:
Journal Volume: 51; Journal Issue: 3; Journal ID: ISSN 1738-5733
Publisher:
Korean Nuclear Society
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; nonlinear ultrasound; surface wave; in-situ monitoring; high-cycle fatigue

Citation Formats

Dib, Gerges, Roy, Surajit, Ramuhalli, Pradeep, and Chai, Jangbom. In-situ fatigue monitoring procedure using nonlinear ultrasonic surface waves considering the nonlinear effects in the measurement system. United States: N. p., 2019. Web. doi:10.1016/j.net.2018.12.003.
Dib, Gerges, Roy, Surajit, Ramuhalli, Pradeep, & Chai, Jangbom. In-situ fatigue monitoring procedure using nonlinear ultrasonic surface waves considering the nonlinear effects in the measurement system. United States. doi:10.1016/j.net.2018.12.003.
Dib, Gerges, Roy, Surajit, Ramuhalli, Pradeep, and Chai, Jangbom. Mon . "In-situ fatigue monitoring procedure using nonlinear ultrasonic surface waves considering the nonlinear effects in the measurement system". United States. doi:10.1016/j.net.2018.12.003. https://www.osti.gov/servlets/purl/1512691.
@article{osti_1512691,
title = {In-situ fatigue monitoring procedure using nonlinear ultrasonic surface waves considering the nonlinear effects in the measurement system},
author = {Dib, Gerges and Roy, Surajit and Ramuhalli, Pradeep and Chai, Jangbom},
abstractNote = {Second harmonic generation using nonlinear ultrasonic waves have been shown to be an early indicator of possible fatigue damage in nuclear power plant components. This technique relies on measuring amplitudes, making it highly susceptible to variations in transducer coupling and instrumentation. This paper proposes an experimental procedure for in-situ surface wave nonlinear ultrasound measurements on specimen with permanently mounted transducers under high cycle fatigue loading without interrupting the experiment. It allows continuous monitoring and minimizes variation due to transducer coupling. Moreover, relations describing the effects of the measurement system nonlinearity including the effects of the material transfer function on the measured nonlinearity parameter are derived. An in-situ high cycle fatigue test was conducted using two 304 stainless steel specimens with two different excitation frequencies. A comprehensive analysis of the nonlinear sources, which result in variations in the measured nonlinearity parameters, was performed and the effects of the system nonlinearities are explained and identified. In both specimens, monotonic trend was observed in nonlinear parameter when the value of fundamental amplitude was not changing.},
doi = {10.1016/j.net.2018.12.003},
journal = {Nuclear Engineering and Technology},
issn = {1738-5733},
number = 3,
volume = 51,
place = {United States},
year = {2019},
month = {1}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

Figure 1 Figure 1: The system block diagram with three lumped sources of nonlinearity: The transmitter, material and receiver. Each source has its corresponding linear transfer function (HT ; HM ; HR) and nonlinearity coefficient (KT ; KM ; KR)

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