Published September 27, 1986 | Version v1
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Improvement of the defect detection capability of ultrasonic inspection of coarse-grained austenitic materials by means of a combination of signal enhancement methods

Creators

Description

The decorrelation of ultrasonic, scattered signals by spatial or frequency variation is determined, together with the number of scattered signals with given flattening of the background. A prototype device is available that allows an examination of the geometry of electromagnetic ultrasonic transducers (EMUS transducer) for the generation of shear horizontal waves. Ultrasonic propagation in textured materials (such as austenitic seam welds) is described analytically and numerically. (DG)

Abstract (German)

Die Dekorrelation von Ultraschall-Streusignalen durch Orts- und/oder Frequenzvariation und deren Anzahl bei vorgegebener Glaettung des Streuuntergrundes wurden bestimmt. Ein Prototypgeraet erlaubt die Untersuchung der Geometrie von elektromagnetischen Ultraschallwandlern (EMUS-Wandler) zur Erzeugung von SH-Wellen. Die Schallausbreitung in texturierten Gefuegen (z.B. austenitischen Schweissnaehten) wird analytisch und numerisch beschrieben. (DG)

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Additional details

Additional titles

Subtitle (English)
Final report
Original title (German)
Verbesserung des Fehlernachweisvermoegens bei der Ultraschallpruefung grobkoerniger austenitischer Werkstoffe durch Kombination von Signalanhebungsverfahren
Original subtitle (German)
Abschlussbericht.

Publishing Information

Imprint Pagination
73 p.
Report number
FhG-IzfP--860538-TW

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
19068469
Subject category
S42: ENGINEERING;
Descriptors DEI
ACCURACY; ALLOY-NI54CR22CO13MO9; ALLOY-NI65CR25MO10; SENSITIVITY; SIGNAL DISTORTION; SIGNALS; STEEL-CR18NI11; ULTRASONIC TESTING; WELDED JOINTS
Descriptors DEC
ACOUSTIC TESTING; ALLOYS; ALUMINIUM ADDITIONS; AUSTENITIC STEELS; CARBON ADDITIONS; CHROMIUM ALLOYS; CHROMIUM-NICKEL STEELS; COBALT ALLOYS; CORROSION RESISTANT ALLOYS; HEAT RESISTING ALLOYS; HIGH ALLOY STEELS; INCONEL ALLOYS; IRON ALLOYS; IRON BASE ALLOYS; JOINTS; MATERIALS TESTING; MOLYBDENUM ALLOYS; NICKEL ALLOYS; NICKEL BASE ALLOYS; NIMONIC; NONDESTRUCTIVE TESTING; STAINLESS STEELS; STEELS; TESTING

Optional Information

Contract/Grant/Project number
Contract GRS 1500 6225