Under the Turbine Engine Sustainment Initiative (TESI) a new approach for determining embedded defect sensitivity and detection criteria is currently being developed. Results obtained thus far indicate that specimens containing targets, which represent the range of reflectivities expected for embedded defects, can be used to simulate natural defects for inspection development. Correlations between the ultrasonic response from these simulated defects and machined targets such as FBHs and SDHs can be used to determine the expected sensitivity as a function of depth in the part. A-scan and C-scan data obtained using linear array transducers were compared to that from single element focused conventional transducers. Similar sensitivities for both the conventional and linear array transducers showed that both transducers are applicable for inspections over the range of depths and target reflectivies discussed. Further studies are under way to fully characterize the focused beam profile inside the component, and to examine the response of the array transducers to targets with different reflectivities within other matrix materials, using angle beams as well as normal incidence.
Defect detection and classification in aerospace materials using phased array ultrasonics
Fehlernachweis und -klassifizierung in Raumfahrtwerkstoffen mittels phasengesteuerten Gruppenstrahlern
2004
8 Seiten, 4 Bilder, 3 Tabellen, 6 Quellen
(Nicht paginiert)
Aufsatz (Konferenz)
Datenträger
Englisch
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