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Acoustic Microscope Inspection of Cylindrical Butt Laser Welds

  • R.Gr. MaevEmail author
  • F. Severin
Conference paper
Part of the Acoustical Imaging book series (ACIM, volume 30)

Abstract

Presented work was made in order to develop the ultrasound technique for quality control of critical butt laser welds in automotive production. The set of powertrain assemblies was tested by high resolution acoustic microscopy method. The pulse-echo Tessonics AM 1102 scanning acoustic microscope was modified to accommodate cylindrical configuration of the parts. The spherically focused transducers with frequencies 15, 25 and 50 MHz were used; ultrasonic beam was focused on the joint area. Three-dimensional acoustic images were obtained and analyzed. The clear distinction between weld seam and remaining gap was demonstrated on the B- and C-scans representation. Seam depth varying from 0 up to 3.2 mm was measured along the weld. Different types of defects (porosity, cracks, lack of fusion) were detected and classified. The optimized analytical procedures for signal processing and advanced seam visualization were determined. The results were used as a basis for development of specialized instrumentation for inspection of this kind of parts in industrial environment. The technical requirements were established and the general design of new cylindrical acoustical scanner was made.

Keywords

Laser weld Butt weld Seam crack Acoustic microscopy Non-destructive evaluation 

Notes

Acknowledgments

The authors are grateful to the Magna Powertrain AG & Co. KG (Lannach, Austria) for providing of samples, attention and support to the project.

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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  1. 1.Chrysler/NSERC Industrial Research Chair in Applied Solid State Physics and Material Characterization, The Institute for Diagnostic Imaging Research, University of WindsorWindsorCanada
  2. 2.The Institute for Diagnostic Imaging Research, University of WindsorWindsorCanada

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