High temperature ultrasonic crack monitoring using SH waves
High temperature ultrasonic crack monitoring using SH waves
复制标题
DOI：
10.1016/j.ndteint.2011.07.003
复制
发表时间：
2011-12-01
影响因子：
4.2
通讯作者：
Davies, J. O.
中科院分区：
文献类型：
--
作者：
Cegla, F. B.;Jarvis, A. J. C.;Davies, J. O.
描述了一种可永久安装的高温裂纹监测系统的原型实现。该系统使用波导阵列在待检测部件的表面上激发剪切水平（SH）波。波导管由导热性差的不锈钢制成，因此可以承受较大的温度梯度。这确保了传统的压电换能器可以在波导的一端使用以激发超声波，而另一端与位于高温（高达600摄氏度）的恶劣环境中的待监测部件接触。讨论了利用SH波进行裂纹监测的不同策略。给出了缺口板上阵列原型的仿真和实验结果。此外，还显示了对含有疲劳裂纹的样品的实验结果，以及在550 ℃的炉中从缺口板收集的测量结果。(C)2011爱思唯尔有限公司保留所有权利。
The prototype implementation of a permanently installable high temperature crack monitoring system is described. The system uses an array of waveguides to excite shear horizontal (SH) waves on the surface of the component that is to be inspected. The waveguide is made of poorly heat conducting stainless steel so that it can sustain a large temperature gradient. This ensures that conventional piezoelectric transducers can be used at one end of the waveguide to excite ultrasonic waves while the other end is in contact with the component to be monitored which is situated in a harsh environment at elevated temperature (up to 600 degrees C). Different crack monitoring strategies using SH waves are discussed. Simulation and experimental results for the array prototype on notched plates are presented. Furthermore, experimental results on samples containing fatigue cracks are shown and measurement results that were collected from a notched plate in a furnace at 550 degrees C are also presented. (C) 2011 Elsevier Ltd. All rights reserved.