Kim Young H, Song Sung-Jin, Kwon Sung-Duk, Cheong Yong-Moo, Jung Hyun-Kyu
School of Mechanical Engineering, Sungkyunkwan University, Suwon 440-746, South Korea.
Ultrasonics. 2004 Apr;42(1-9):551-5. doi: 10.1016/j.ultras.2004.01.031.
A plate of Inconel 600 was interrogated using the resonant ultrasound spectroscopy (RUS) and the reflected leaky Lamb waves (LLW). It was found that the plate used in the present work has anisotropy in its material properties by the RUS. The longitudinal and the transverse wave velocities of the Inconel 600 plate were determined by the RUS, ultrasonic pulse-echo method and cut-off frequencies of the LLWs. The wave velocities in the direction of thickness determined by the RUS under the assumption of the orthotropic symmetry were quite similar to those obtained by other methods, the pulse-echo method and from cut-off frequencies. The reflected LLW from the plate was measured with varying the incident angle. The dispersion curves obtained from the reflected LLWs show good agreement with the theoretical calculation in general. The mismatches may be caused by anisotropy of the plate.
使用共振超声光谱法（RUS）和反射泄漏兰姆波（LLW）对一块因科镍合金600板材进行了检测。通过RUS发现，本工作中使用的板材在材料特性上具有各向异性。因科镍合金600板材的纵向和横向波速由RUS、超声脉冲回波法以及LLW的截止频率确定。在正交各向异性对称假设下，由RUS确定的厚度方向上的波速与通过其他方法（脉冲回波法和截止频率）获得的波速非常相似。测量了板材反射的LLW随入射角的变化情况。从反射LLW获得的色散曲线总体上与理论计算结果吻合良好。这些不匹配可能是由板材的各向异性引起的。
