Ultrasonic Grain Noise Modeling: Recent Applications to Engine Titanium Inspections

Ultrasonic Inspectability Models for Jet Engine Forgings

“…The modeling software does not currently predict backscattered noise levels, but models are under development in the Engine Titanium Consortium to make such predictions; see, e.g., Ref. 5.…”

Bruce Thompson: Adventures and advances in ultrasonic backscatter

“…Bruce knew both Bob Gilmore and Pat Howard personally, so we were able to get access to their original data. We modeled both the FBH and gated-peak-grain-noise inspections, and then combined the results to estimate S/N or N/S ratios [48]. We did not know the FOM values for their three forging specimens, so we could not predict absolute N/S ratios.…”

“…It follows directly from the small-flaw Thompson-Gray measurement model and the Independent Scatterer Noise model if certain simplifying approximations are made. [12,31,48]. The rule-of-thumb itself and its key underlying assumptions are stated in Fig.…”

Development and Application of UT Models in Titanium Inspection Development

“…[22]. evaluation of the improvement of multizone billet inspection over conventional approaches, interpretation of the relationship of noise to the volume of the ultrasonic pulse, interpretation of the dependence of noise on the location and duration of the time gate, and assessment of the effects of part surface curvature on grain noise and signal-to-noise ratio.…”