Measurement of physical characteristics of materials by ultrason

Measuring and testing – Vibration – By mechanical waves

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73643, 73602, 73159, G01H 500

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active

058047271

ABSTRACT:
A method is described for determining and evaluating physical characteristics of a material. In particular, the present invention provides for determining and evaluating the anisotropic characteristics of materials, especially those resulting from such manufacturing processes as rolling, forming, extruding, drawing, forging, etc. In operation, a complex ultrasonic wave is created in the material of interest by any method. The wave form may be any combination of wave types and modes and is not limited to fundamental plate modes. The velocity of propagation of selected components which make up the complex ultrasonic wave are measured and evaluated to determine the physical characteristics of the material including, texture, strain/stress, grain size, crystal structure, etc.

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Man, C. and W. Lu "Measurement of Stress Using Ultrasonic Techniques Based on a New Acoustoelastic Theory" Proceedings of the Sixth International Conference, Beijing, People's Republic of China, vol. 2, Permagon Press Sep. 11-15, 1988 pp. 979-988.

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