Method of analyzing ultrasonic inspection data from turbine wheel finger dovetails to identify the presence of cracks on the finger ledges
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United States of America Patent
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Aug 17, 2010
Grant Date -
Sep 17, 2009
app pub date -
Mar 13, 2008
filing date -
Mar 13, 2008
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method of analyzing ultrasonic inspection data from turbine wheel or bucket dovetail fingers for a crack about a ledge thereof with the turbine wheel or bucket having a number of adjacent holes therethrough. The method may include inserting an ultrasonic probe into a first hole, rotating an ultrasonic beam of the ultrasonic probe to scan the adjacent holes, scanning each adjacent hole, and determining the presence of the crack in the ledge by the failure to receive a signal from one or more of the adjacent holes.
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