By G. A. D. Briggs, C. M. W. Daft, A. F. Fagan, T. A. Field, C. W. Lawrence, M. Montoto (auth.), Hiroshi Shimizu, Noriyoshi Chubachi, Jun-ichi Kushibiki (eds.)

The seventeenth overseas Symposium on Acoustical Imaging was once held at Tohoku collage, Sendai, Japan, in the course of may perhaps 31-June 2, 1988. The symposium used to be geared up by way of the ultrasonics learn team of Tohoku college and the IEEE ijFFC Society, Tokyo bankruptcy. Of the 128 papers submitted, 88 have been awarded through the symposium, which comprised a hundred and forty four researchers from thirteen international locations. This quantity includes eighty one papers because the list of the symposium and is clas­ sified into the next sections: (1) Acoustic Microscopy and its functions; (2) Non-Destructive assessment; (3) sign Processing of pictures; (4) Acoustic Measurements and actual Acoustics; (5) clinical Ultrasonic Diagnostics; (6) Acoustic Sensors; (7) Acoustic Holography and Tomography; (8) Seismic Exploration; and (9) Imaging Instrumentation and different innovations. the various papers submitted have been linked to scientific ultrasonic diagnostics and acoustic microscopy, reflecting an enormous job in acousti­ cal imaging at Tohoku collage. for that reason, invited talks have been eager about this sector: acoustic microscopy by way of Dr. G. A. D. Briggs of the collage of Oxford and clinical ultrasonics by way of Prof. M. Tanaka of Tohoku college. In mild of the historical past of study during this box at our collage, we're thrilled to have had the chance to host the seventeenth symposium.

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18 m m//J-sec Acoustic attenuation C (a)........................... Longitudinal velocityc........... 96 mm//J-sec a. polycrystalline unless noted; b. ; c. 0 GHz 8. Finally, the results of a brief literature search that revealed some variations in the elastic properties, particularly bulk velocities of the polycrystalline titanium metal is summarized in Table 1. The acoustic velocity appears to be subject to an uncertainty of 1% and a consequent 2 % variation in the value of the corresponding modulus.

Scanning Acoustic Microscope (Report from Olympus Corp. :t;4I:!.... c:::h~~, Oct. 1982, pp. 119-120 8. ~. , university of Bremen, 1986, in german 9. , Vol. 18, No. 15 (1982), pp. 668-670 10. :t;~. Nondestr. , Proc. , Evanston Illinois, USA, I~j'::::::'26:''''s'ep't':''-1985, Martinus Nijhoff Publishers, Netherlands (1987), pp. 155-169 11. ~,,,,,, Vol. 2, Febr. 1982, pp. 846-850 12. , Film adhesion studies with the acoustic microscope, Thin Solid Films, 74 (1980), pp. 2 9 5 - 3 0 2 " " " " " ' " ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' 50 ACOUSTIC MICROSCOPE STUDY OF A TITANIUM DIFFUSION BOND R.

Film adhesion studies with the acoustic microscope, Thin Solid Films, 74 (1980), pp. 2 9 5 - 3 0 2 " " " " " ' " ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' 50 ACOUSTIC MICROSCOPE STUDY OF A TITANIUM DIFFUSION BOND R. D. Weglein 6317 Drexel Avenue, Los Angeles, CA 90048, USA INTRODUCTION The need for more reliable and cost-effective nondestructive inspection methods is never ending. In particular, the ability to locate and possibly to quantify the microscopic strength-determining imperfections in diffusion bonds suggests that ultra-high frequency (UHF) ultrasonic techniques might render an appropriate tool.

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