Nonlinear Acoustic Evaluation of Creep Damage in Boiler Heat Exchange Tubes
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概要
- 論文の詳細を見る
In this study, we evaluated creep damage accumulation in steel welds using the nonlinear acoustic method and microstructural observation. The welds used for the experiment had been employed in boiler exchange tubes of a fossil fuel power plant for 20 years. Samples were cut from the welded region so that they had two planes parallel to the longitudinal direction of the tubes. For the nonlinear acoustic method, we used the immersion technique. Burst waves of 18 MHz were transmitted to the samples, and harmonic waves were detected in the reflection to obtain the images of amplitudes. Increased amplitudes were measured around the heat-affected zone (HAZ), which corresponded to the areas of high creep void density observed by microscopy. The nonlinear acoustic method has been confirmed to have the potential to assess the creep damage.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2007-07-30
著者
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Kawashima Koichiro
Ultrasonic Materials Diagnosis Lab.
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Ohtani Toshihiro
Department of Mechanical Systems Engineering, Shonan Institute of Technology, Fujisawa, Kanagawa 251-8511, Japan
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Guagliard Paul
Materials and Engineering Science, Australian Nuclear Science and Technology Organization, Menai, NSW 2234, Australia
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Drew Michael
Materials and Engineering Science, Australian Nuclear Science and Technology Organization, Menai, NSW 2234, Australia
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Kawashima Koichiro
Ultrasonic Materials Diagnosis Lab., Nagoya 466-8555, Japan
関連論文
- P3-24 Nonlinear acoustic evaluation of creep damage in boiler heat exchange tubes(Poster session 3)
- Backscattered Transverse Wave Imaging of Cracked-Faces with Linear and Nonlinear Ultrasonics
- Harmonic Imaging of Plastic Deformation in Thin Metal Plates Using Nonlinear Ultrasonic Method
- Creep-Induced Microstructural Changes and Acoustic Characterization in a Cr–Mo–V Steel
- Noncontact Evaluation of Surface-Wave Nonlinearity for Creep Damage in Cr–Mo–V Steel
- Nonlinear Acoustic Evaluation of Creep Damage in Boiler Heat Exchange Tubes