Presenter Information

C F. Vasile, Rockwell International

Location

Ithaca, NY

Start Date

1978 12:00 AM

Description

A brief summary of newly developed techniques for ultrasonic inspection of small diameter tubes using EMAT's is given. The technique employs a periodic-permanent magnetic torsion wave transducer which fits inside and can be quickly translated through the tube. Both dominant and higher order ultrasonic modes traveling longitudinally along the tube can be individually excited by varying the transducer design parameters. Experimental results are presented which define transduction efficiencies in aluminum, Inconel, and steel and the sensitivities of the various wave types to different defects. The ability of these techniques to detect flaws in difficult regions such as U-bends and dents is reported.

Book Title

Proceedings of the ARPA/AFML Review of Progress in Quantitative NDE

Chapter

8. New Technology Roots

Pages

350-354

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Steam Generator Tube Inspections with EMAT's

Ithaca, NY

A brief summary of newly developed techniques for ultrasonic inspection of small diameter tubes using EMAT's is given. The technique employs a periodic-permanent magnetic torsion wave transducer which fits inside and can be quickly translated through the tube. Both dominant and higher order ultrasonic modes traveling longitudinally along the tube can be individually excited by varying the transducer design parameters. Experimental results are presented which define transduction efficiencies in aluminum, Inconel, and steel and the sensitivities of the various wave types to different defects. The ability of these techniques to detect flaws in difficult regions such as U-bends and dents is reported.