Ultrasonic Testing of Austenitic and Dissimilar Metal Welds Rudi Schmid * Chapter 4 of the Book: "Ultraschallprüfung von austenitischen Plattierungen, Mischnähten und austenitischen Schweißnähten" Eberhard Neumann et al Eberhard.Neumann@bam.de Expertverlag 1995 Kontakt & Studium; Bd. 377: Werkstoffe ISBN-3-8169-1078-5 Mit 340 Seiten, 204 Bildern und 210 Literaturstellen (c) Expert Verlag; D- 71272 Renningen Malmsheim. Homepage: www.expertverlag.de

Preface (in German)

4.1 ..... State of the Art
4.2 ..... Probes and Testing Techniques
4.2.1 .. Longitudinal Probes
4.2.1.1 55°- SEL-Probe
4.2.1.2 70°-SEL-Probe
4.2.1.3 Creeping wave Probes
4.2.1.4 Mode Conversion Probes
4.2.1.5 ADEPT-Probe
4.2.1.6 Conclusion
4.2.2 .. Shear Wave Probe
4.2.2.1 Piezoelectric Probes
4.2.2.2 EMAT - Probes


4.3 ..... Test Effects and Test Techniques
4.3.1 .. Geometry Reflection
4.3.2 .. Corner Effect
4.3.3 .. Mode Conversion with Neighbor Echo 2 method
4.3.4 .. Tandem- and Equivalent Tandem Test Technique
4.3.4.1 The classical Tandem Technique with Vertical Polarized Shear Waves
4.3.4.2 The LLT-Technique
4.3.4.3 Normal Probe - Mode Conversion Technique (Neighbor Echo 1)


4.4 ..... Experimental Investigation with vertical and horizontal polarized Shear- and Longitudinal Waves at "Narrow Slot Welds"Test Effects and Test Techniques
4.4.1 .. Comparison of vertical and horizontal polarized shear waves and longitudinal waves.
4.4.2 .. Interface- Reflectionability of the Narrow Slot Welds


4.5 ..... Test Results of austenitic Welds, Dissimilar Metal Welds and Claddings
4.5.1 .. Austenitic - and Dissimilar Metal Welds
4.5.2 .. Overlay- and Backlay
4.5.2 1 Overlay
4.5.2 2 Backlay
4.5.3 .. Narrow Slot Welds
4.5.3.1 Classical Tandem Testing
4.5.3.2 LLT-Technique
4.5.3.3 Normal Probe - Mode Conversion Technique (Neighbor Echo 1)


4.6 ..... Test Results Analysis and Crack depth Determination
4.6.1 .. Test Result Analysis
4.6.2 .. Crack Depth Determination
4.6.3 .. Detection of Natural Cracks


4.7 ..... Visualization of Test Results via Imaging Methods
4.7.1 .. A-scan, B-scan, C-scan and D-scan
4.7.2 .. Broadband- Holography
4.7.2.2 Analysis of a notch reflector through an austenitic weld
4.7.2.3 Analysis in the cladding zone.
4.7.2.4 Analysis of an austenitic weld root


4.8 .. Comparison of EMAT- SH- and SEL Technique for Testing of Dissimilar Metal Reference Bodies
4.8.1 History
4.8.2 Test Results at a Dissimilar Metal Reference Bodies


...... Appendix

[A] Scholarly Books and Monographs
[B] Standards and Guidelines
[C] Published Work

For more information see backup issue: NDTnet 12/97: NDT in Power Generation.