Laser-Ultrasonic Determination of Elastic Constants at Ambient and Elevated Temperatures
It is well known that the elastic constants of an isotropic solid (the bulk and shear moduli or the Young’s modulus and the Poisson’s ratio) can be determined ultrasonically when both longitudinal and shear wave velocities are measured. At high temperature, traditional ultrasonic techniques are difficult to apply because they require a coupling medium operating in the same temperature range. However, some results have been previously reported using momentary contact1–2, but the application remains difficult, especially for shear wave coupling, and above 1000°C. Obviously, an ultrasonic technique where ultrasound is generated and detected without contact can avoid such problems.
KeywordsShear Wave Elastic Constant Shear Wave Velocity Ultrasonic Attenuation Head Wave
Unable to display preview. Download preview PDF.
- 3.C.B. Scruby, R.J. Dewhurst, D.A. Hutchins and S.B. Palmer, “Laser generation of ultrasound in metals”, in Res. Techniques on Nondestructive Testing (vol. 5), R.S. Sharpe, Ed., Academic Press, New York, p. 281–327, (1982).Google Scholar
- 4.J.-P. Monchalin, “Optical detection of ultrasound”, IEEE Trans. Ultrason., Ferroelectrics, Freq. Contr., vol. UFFC-33, p. 485–499 (1986).Google Scholar
- 5.L. Piché, B. Champagne and J.-P. Monchalin, “Laser ultrasonics measurement of elastic constants of composites”, Materials Evaluation, p. 74–79, vol. 45, no. 1, 1987.Google Scholar
- 7.J.-P. Monchalin, R. Héon and N. Muzak, “Evaluation of ultrasonic inspection procedures by field mapping with an optical probe”, Canadian Metallurgical Quaterly, to be published.Google Scholar
- 8.C.A. Calder and W.W. Wilcox, “Noncontact material testing using laser energy deposition and interferometry”, Materials Evaluation, p. 86–96, January 1980.Google Scholar
- 9.J.D. Achenbach, Wave propagation in elastic solids, North Holland, New York, 1973, see chap. 7.11.Google Scholar
- 10.B. Jaffe, W.R. Cook and H. Jaffe, Piezoelectric ceramics, Academic Press, New York, 1971, see chap. 7.Google Scholar