| CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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Evaluation of Thermal Degradation Induced Material Damage Using Nonlinear Lamb Waves |
| XIANG Yan-Xun1, XUAN Fu-Zhen1, DENG Ming-Xi2 |
| 1Key Laboratory of Safety Science of Pressurized System of MOE, School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 2002372Department of Physics, Logistics Engineering University, Chongqing 400016 |
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| Cite this article: |
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XIANG Yan-Xun, XUAN Fu-Zhen, DENG Ming-Xi 2010 Chin. Phys. Lett. 27 016202 |
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Abstract We report on the evaluation of thermal degradation damage in metal material using the nonlinear effect of Lamb wave propagation. A ``mountain-shape'' change in the second harmonic of Lamb wave propagation versus the level of thermal degradation in the specimens is observed. It is attributed to the precipitations in the early stage and the microvoids after long-term service in terms of metallographic studies. The results show that the nonlinear Lamb wave is very sensitive to the microstructure evolution and is a good potential for quantitative evaluation of the thermal damaged materials.
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| Keywords:
62.20.-x
43.25.+y
81.70.Cv
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Received: 11 September 2009
Published: 30 December 2009
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| PACS: |
62.20.-x
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(Mechanical properties of solids)
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43.25.+y
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(Nonlinear acoustics)
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81.70.Cv
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(Nondestructive testing: ultrasonic testing, photoacoustic testing)
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