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Ultraschallprüfung von austenitischen und Mischschweißverbindungen mit SH-Wellen und EMUS-Prüfköpfen

 
: Högberg, K.; Eriksson, H.; Hübschen, G.; Salzburger, H.J.

Deutsche Gesellschaft für Zerstörungsfreie Prüfung e.V. -DGZfP-, Berlin:
60 Jahre DGZfP - Erfahrungen und Nutzen für Europa. Vorträge und Plakatberichte. Teil 1
1993 (DGZfP-Berichtsbände 37)
pp.241-248
Jubiläumstagung Zerstörungsfreie Materialprüfung <1993, Garmisch-Partenkirchen>
German
Conference Paper
Fraunhofer IZFP ()
austenitic weld; austenitische Schweißnaht; dissimilar metal; electromagnetic ultrasonic probe; elektromagnetische Ultraschallwandlung; EMUS; Mischnaht; SH-wave; SH-Welle; Ultraschallprüfung; ultrasonic testing

Abstract
Among the different ultrsonic wave modes - Longitudinal (L-) waves, Shear wves wiht polarization in the plane of incidence (SV-waves) and Shear waves with polarization perpendicular to the plane of incidence (SH-waves), L-waves with a high beam angle of 70 (TRL 70) and SH-waves show most promising advantages for the inspection of austenitic and dissmilar metal welds. Whereas high beam angle L-waves excited and detected by conventional piezoelectric probe-technology and equipments have been used for some years, for the application of SH-waves appropriate EMUS-probes and instrumentations had to be developed. The contribution will describe the design of EMUS-probes and equipments. The experimental verification of the theoretically predicted capability of SH-waves to penetrate into the weld and to pass through the weld will be demonstrated by results of automated test specimen-measurements. The EMUS-Sh-wave technique has been successfully applied in several swedish muclear power pants.

: http://publica.fraunhofer.de/documents/PX-37393.html