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|Author(s):||Nelson N. Hsu; Gerald V. Blessing; D Xiang;|
|Title:||Time-Resolved Ultrasonic Body Wave Measurements of Materials Anisotropy Using a Lensless Line-Focus Transducer|
|Published:||March 30, 1999|
|Abstract:||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 which can be interpreted as the reflected and mode converted waves. These echoes are time-resolved and their arrival times are polarization dependent. A simple polar display of the rotationally scanned time waveforms reveals intriguing details that resemble slowness curves. We present both experimental and theoretical results for body wave measurements using our line-focus transducer on various crystals.|
|Proceedings:||Proc. 1998 IEEE International Ultrasonics Symposium - Sendai/Japan, Oct 98.|
|Pages:||pp. 1261 - 1264|
|Dates:||October 5-8, 1998|
|Keywords:||anisotropy,Line-focus Microscopy,Ultrasonic transducer|
|Research Areas:||Mechanical Metrology|