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Measurement of Longitudinal and Transverse Wave Speed in Solid Materials Using Immersion Ultrasonic Testing  

Shin, Yo-Sub (Korea Science Academy)
Yoon, Yeo-Ho (Korea Science Academy)
Kim, Young-H. (Korea Science Academy)
Publication Information
Journal of the Korean Society for Nondestructive Testing / v.28, no.1, 2008 , pp. 40-45 More about this Journal
Abstract
Immersion ultrasonic testing (UT) was used to determine elastic moduli of solid materials instead of the widely-used contact UT method. Conventionally, immersion UT is only used for determining the longitudinal wave speed. However, in this research, transverse wave speed was measured through finding transverse wave echoes caused by mode-conversion at material's boundary. Also, even in the cases when wave speeds could not be determined due to unknown thickness, Poisson's ratio was able to be calculated from the ratio of longitudinal and transverse wave speeds. This technique was verified for several materials, and it was found that higher accuracy was obtained by immersion UT method for materials either with relatively high wave speed or with relatively small Poisson's ratio. This technique thus will be suitable fur ceramics or high strength materials.
Keywords
Immersion Ultrasonic Testing; Ultrasonic Wave Speeds; Elastic Moduli; Poisson's Ratio;
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  • Reference
1 G. W. C. Kaye and T. H. Laby, 'Tables of physical and chemical constants,' Online version, http://www.kayelaby.npl.co.uk/ general_physics/2_4/2_4_1.html
2 Y. H. Kim, J. K. Lee and H. C. Kim, 'Transverse-wave modes in the pulse-echo signal of a normal-beam longitudinal-wave mode transducer,' J. Korean Phys. Soc., Vol. 42, pp. 111-117, (2003)
3 H. F. Pollard, 'Sound waves in solids,' p. 15 and pp. 25-26, Pion Limited, London, (1977)
4 A. Kumar, T. Jayakumar, B. Raj and K. K. Ray, 'Correlation between ultrasonic shear wave velocity and Poisson's ratio for isotropic solid materials,' Acta Materialia, Vol. 51, pp. 2417-2426, (2003)   DOI   ScienceOn
5 Don J. Roth, James D. Kiser, Suzanne M. Swickard, Steven A. Szatmary and David P. Kerwin. 'Quantitative mapping of pore fraction variations in silicon nitride using an ultrasonic contact scan technique,' NASA TP-3377, NASA, Cleveland, Ohio, U.S.A. (1993)
6 김정표, 석창성, 송성진, 김영환, '선형 및 비선형 초음파를 이용한 1Cr-1Mo-0.25V의 열화평가에 관한 연구', 비파괴검사학회지, 제 21권 제 5호, pp. 549-555, (2001)