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AssigneeFramatome ANP GmbH
InventorsRussell M. Matney, Mihai G. Pop, Joseph R. Wyatt III
Estimating the term…
A method for sizing crack is disclosed using a combination of depth crack sizing methods to improve crack sizing accuracy for thin walled tubing and tight crack surface opening less than 0.001 inches for cracks of any depth. The tube or plate wall can consist of a single material or multiple metallic electrodeposited or otherwise intimately bonded layers of materials with different magnetic properties and the sizing method comprises known depth sizing methods such as shear wave, time of flight and THE SELECTIVE USE OF two unique depth sizing methods designated as Mode Converted Signal (MCS) and Full Skip Normalization (FSN) which provide correction factors for the known sizing methods.
A method of sizing cracks in a metal surface using sound wave measurements of propagation and reflection thereof which are initiated at an optimal degree angle to the surface comprising the steps of:
An FSN method where the ratio of the full skip amplitude to the average of the outer diameter skip amplitudes produces a normalized result. This ratio can be used to depth size deep cracks propagating from the surface opposite from the UT transducer.
Dependencies are inferred from the claim text.