Abstract
The depth of short cracks (70–200 μm surface length) has been measured with an acoustic microscope by utilizing the nondestructive time-of-flight diffraction technique (TOFD). The depth measurements were first carried out in the transparent polymer polystyrene, thus allowing a comparison between the acoustical values and direct optical measurements: the agreement in the results was better than 95%. The depth of a 70 μm long crack in an aluminium alloy was then measured, demonstrating the application of the technique to metals.
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References
D. J. Nicholls and J. W. Martin, Int J. Fatigue 12 (1990) 469.
J. P. Charlesworth and J. A. G. Temple, “Ultrasonic Time-of-Flight Diffraction” (Wiley, 1989).
M. R. Weaver, C. M. W. Daft and G. A. D. Briggs, IEEE Trans. Ultrason. Ferroelect. Frequency Control 36 (5) (1989).
T. Zhai, “Depth Measurements of Short Cracks in Perspex With The Scanning Acoustic Microscope”, 20th International Symposium on Acoustical Imaging, Nanjing, China, 12–14 September, 1992.
M. G. Silk, Ultrasonics 17 (3) (1979).
J. A. Ogilvy and J. A. G. Temple, ibid. 21 (6) (1983).
G. A. D. Briggs, P. J. Jenkins and M. Hoppe, J. Microscopy 159 (1990) 15.
M. G. Somekh, in “Elastic Waves and Ultrasonic Nondestructive Evaluation”, edited by S. K. Datta, J. D. Achenbach and Y. S. Rajapakse (1990).
M. G. Somekh, H. L. Bertoni, G. A. D. Briggs and N. J. Burton, Proc. R. Soc. Lond. A 401 (1985) 29.
G. A. D. Briggs, “Acoustic Microscopy” (Oxford University Press, 1992).
K. H. Chan and H. L. Bertoni, IEEE Trans. Ultrason. Ferroelect. Frequency Control 38 (1) (1991).
H. L. Bertoni, IEEE Trans. Sonics Ultrason, su-31 (2) (1984).
R. H. Tew, J. R. Ockendon and G. A. D. Briggs, in “Recent Developments in Surface Acoustic Waves”, edited by D. F. Parker and G. A. Margin (Springer, 1988) pp. 309–16.
W. Müller, E. Bubeck and V. Gerold, in “Aluminium-Lithium Alloys III”, Proceedings of the 3rd International Aluminium-Lithium Conference (Institute of Metals, London).
S. F. Burch, Ultrasonics 25 (9) (1987).
B. London, J. C. Shyne and D. V. Nelson, in “The Behaviour of Short Fatigue Cracks”, edited by K. J. Miller and E. R. de los Rios (Mechanical Engineering Publications, 1986).
R. B. Thompson, C. J. Fiedler and O. Buck, in “Nondestructive Measurements for Materials Property Determination”, edited by C. O. Ruud and R. E. Green (Plenum Press, New York, 1984) pp. 161–70.
R. B. Thompson, B. J. Skillings, L. W. Zachary, L. W. Schmerr and O. Buck, in “Review of Progress in Quantitative Nondestructive Evaluation”, Vol. 12A, edited by D. O. Thompson and D. E. Chimenti (Plenum Press, New York, 1982) pp. 325–41.
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Knauss, D., Bennink, D.D., Zhai, T. et al. Depth measurement of short cracks with an acoustic microscope. JOURNAL OF MATERIALS SCIENCE 28, 4910–4917 (1993). https://doi.org/10.1007/BF00361155
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DOI: https://doi.org/10.1007/BF00361155