Ultrasonics International 93. Conference Proceedings by Yong Zhou

By Yong Zhou

Ultrasonics overseas ninety three: convention lawsuits offers a complete account of the shows given within the Ultrasonics overseas ninety three convention. It discusses a blood movement mapping approach utilizing ultrasonic waves. It addresses the dynamical reaction features of elastically anisotropic solids.
Some of the themes coated within the e-book are the ultrasonic waves propagation in a liquid generating radicals; ultrasonic characterization of interfaces; floor acoustic wave measurements; line-focus-beam acoustic microscopy; research of fatigue cracks in steels utilizing round lens scanning acoustic microscopy; and the phenomenon of ultrasonic mild diffraction. the outline of bichromatic tunable acousto-optic separator is absolutely coated. The diffraction phenomenon affecting the houses of the fibre-optic sensor process is mentioned intimately. The textual content describes extensive the opto-acoustic dimension of ultrasound speed in a solidifying polymer. The overview of microfracture because of thermal surprise utilizing acoustic emission is totally provided. A bankruptcy is dedicated to the detection of a susceptible adhesive and adherent interface in bonded joints.
The ebook grants important details to engineers, scholars, and researchers.

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Phys. 2622-2624(1991). 5. J. Kushibiki, T. Kobayashi, H. Ishiji, and N. Chubachi, "Elastic properties of 5mol% MgO doped LiNb03 crystals measured by line-focus-beam acoustic microscopy", Appl. Phys. , 61, pp. 2164-2166 (1992). 6. K. Nakamura, M. Kazumi, and H. Shimizu, "SH-type and Rayleigh-type surface waves on rotated Y-cut LiTa03", 1977 IEEE Ultrasonics Symp. 819822(1977). 7. A. W. Warner, M. Onoe, and G. A. Coquin, "Determination of elastic and piezoelectric constants for crystals in class (3m)", J.

Keywords: acoustic microscopy, superplastic forming diffusion bonding, titanium. INTRODUCTION The need to improve performances of aircrafts by reducing cost and weight of metallic structures has led to increase interrest in superplastic forming and diffusion bonding titanium (SPF/DB) alloy processes. The production of heavily loaded flying SPF/DB components for Dassault Aviation's fighters has required quantitative characterization of the diffusion bonds. The particular problems which arise in SPF/DB processing of titanium alloys at the development stage can induced defects at the bond-line which take the form of voids of different sizes, with a gap ranging from the intimate contact disbond up to 20 um.

In this way, we have achieved the V(z) measurement in a wider frequency range than 1 octave using only one acoustic lens. Two point focus acoustic lenses are used in these V(z) measurement; one has a half-aperture angle of 60°, and a focal length of 575μπι focal length for the frequency between 200 and 650MHz, and the other has a half-aperture angle of 60° and a focal length of 270μπι for the frequency between 600 and 750MHz. z z RESULTS Before the measurement of the specimen of interest, we measured the pupil function F\k ) of the acoustic lens.

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