期刊
NDT & E INTERNATIONAL
卷 102, 期 -, 页码 194-198出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ndteint.2018.12.007
关键词
Stress corrosion cracking; Nonlinear resonant ultrasound spectroscopy; Nondestructive evaluation; Nondestructive testing
资金
- U.S. Department of Energy, Nuclear Energy University Program through Integrated Research Project [DE-NE0008442]
- Los Alamos National Laboratory
- BYU College of Physical and Mathematical Sciences
Stainless steel containers are susceptible to stress corrosion cracking (SCC) under certain stress and corrosion conditions. Nonlinear ultrasonic techniques are very sensitive to the early presence of damage, more so than linear techniques. Nonlinear Resonant Ultrasound Spectroscopy (NRUS) is used here to measure a nonlinear shift in the resonance frequency due to a cumulative amount of SCC. Steel rods are immersed in a heated magnesium chloride solution and removed after different exposure times. NRUS measurements are conducted using the fundamental longitudinal mode of vibration. Rods exposed longer generally have a larger resonance frequency shift and are therefore more nonlinear. Thus NRUS might offer a means of detecting a cumulative SCC damage in a sample.
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