Ultrasonic Attenuation Measurement by Backscattering Analysis

Porosity in structural materials limits their ultimate strength and hence their utility. Recently several studies which discuss the porosity induced ultrasonic attenuation have appeared [1–8]. Porosity assessment by ultrasonic attenuation measurement involves two principal problems: first, how to relate the porosity induced ultrasonic attenuation to porosity parameters such as average pore radius and volume fraction, and second, how to separate the sought porosity induced attenuation from other components contributing to the actually measured total attenuation.

[1]  D. Thompson,et al.  Review of Progress in Quantitative Nondestructive Evaluation , 1982 .

[2]  Pramode K. Bhagat,et al.  Attenuation and Backscattering of Ultrasound in Freshly Excised Animal Tissues , 1980, IEEE Transactions on Biomedical Engineering.

[3]  T J Hall,et al.  Tests of the accuracy of a data reduction method for determination of acoustic backscatter coefficients. , 1986, The Journal of the Acoustical Society of America.

[4]  H. Seki,et al.  Diffraction Effects in the Ultrasonic Field of a Piston Source and Their Importance in the Accurate Measurement of Attenuation , 1956 .

[5]  E. Madsen,et al.  Method of data reduction for accurate determination of acoustic backscatter coefficients. , 1984, The Journal of the Acoustical Society of America.

[6]  Laszlo Adler,et al.  Ultrasonic method to determine gas porosity in aluminum alloy castings: Theory and experiment , 1986 .

[7]  B. Khuri-Yakub,et al.  Ultrasonic Attenuation in Ceramics , 1978 .

[8]  Peter H. Rogers,et al.  An exact expression for the Lommel‐diffraction correction integral , 1974 .

[9]  E. Domany,et al.  Effects of Microstructure on the Speed and Attenuation of Elastic Waves: Formal Theory and Simple Approximations , 1983 .

[10]  R. S. Sharpe,et al.  Research techniques in nondestructive testing , 1970 .

[11]  Robert E. Green,et al.  Nondestructive Methods for Material Property Determination , 1984 .

[12]  Surface Roughness Effects in Porosity Assessment by Ultrasonic Attenuation Spectroscopy , 1987 .

[13]  V. Varadan,et al.  A multiple scattering theory for elastic wave propagation in discrete random media , 1985 .

[14]  M. O’Donnell,et al.  Quantitative broadband ultrasonic backscatter: An approach to nondestructive evaluation in acoustically inhomogeneous materials , 1981 .