Kim Taeyang, Kim Jinwook, Jiang Xiaoning
IEEE Trans Ultrason Ferroelectr Freq Control. 2018 Aug;65(8):1444-1451. doi: 10.1109/TUFFC.2018.2839034. Epub 2018 May 21.
In this paper, we present an ultrasound nondestructive testing (NDT) method for high-temperature (HT) applications using laser-generated Lamb waves and aluminum nitride (AlN) sensors. Lamb waves were introduced to a stainless steel plate by the Nd:YAG pulsed laser at one point and detected by an AlN receiver at a distant position. The fundamental symmetric ( ) and antisymmetric ( ) Lamb waves generated by the pulsed laser were successfully detected by the AlN sensor. This detection was done on a stainless steel plate at temperatures ranging from room temperature to about 800 °C, with a signal-to-noise ratio of higher than 20 dB. Based on the time-of-flights analysis, the ability of this NDT method to localize the defect at an HT (~800 °C) has been demonstrated.
在本文中，我们提出了一种用于高温应用的超声无损检测（NDT）方法，该方法使用激光产生的兰姆波和氮化铝（AlN）传感器。通过Nd:YAG脉冲激光在一点处将兰姆波引入不锈钢板，并由位于远处的AlN接收器进行检测。AlN传感器成功检测到了由脉冲激光产生的基本对称（ ）和反对称（ ）兰姆波。该检测在室温至约800°C温度范围内的不锈钢板上进行，信噪比高于20 dB。基于飞行时间分析，已证明该无损检测方法在高温（约800°C）下定位缺陷的能力。
