For plate-like sample geometries, a line-focus transducer can be used to detect back-reflected echoes through the thickness of the sample. The interaction of the convergent cylindrically focused probing wave with the material anisotropy produces multiple echoes of which each can be interpreted as the reflected and mode converted waves. These echoes are time-resolved and their arrivals are polarization dependent. A simple polar display of the rotationally scanned time waveforms reveals intriguing details that resemble the slowness curves. We present both experimental and theoretical results and their comparison of body wave measurements using our line-focus transducer on various crystals.
Proceedings Title: Proceedings for the 1998 IEEE Ultrasonic Symposium
Conference Dates: October 5-8, 1998
Conference Location: Sendai, JA
Conference Title: Ultrasonics Symposium
Pub Type: Conferences
anisotropic materials, line-focus transducer, reflectance of an anisotropic plate, time-resolved ultrasonic test, ultrasonic scans