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Review of Progress in Quantitative Nondestructive Evaluation

Engineering Physics

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Numerical Calculation Of Diffraction Coefficients In Anisotropic Media, J. Temple, L. White Jan 1993

Numerical Calculation Of Diffraction Coefficients In Anisotropic Media, J. Temple, L. White

Review of Progress in Quantitative Nondestructive Evaluation

Ultrasonic inspection is used to detect and size crack-like defects in pressure vessels and pipework used in the nuclear industry. Reliable inspection can only be achieved if the inspection technique is understood, is optimised and subsequently applied correctly. Austenitic steels are used because of their corrosion resistance and toughness. Welds and centrifugally cast materials tend to crystallise with grains larger than the ultrasonic wavelength required to achieve the desired resolution in the inspection and thus appear anisotropic. Since the grains in a weld grow along the, varying, directions of maximum heat flux during cooling, the welds are inhomogeneous as well ...