RECENT ULTRASONIC METHODS FOR THE DISTINCTION BETWEEN DIFFERENT TYPES OF DEFECTS IN WELDS

When compared to radiography conventional ultrasonic testing involves the major disadvantage of not projecting a directly visible image of a defect work piece. Furthermore, reflection points are evaluated only in terms of the reflected amplitude. Consequently, there is always a risk of seriously underevaluating defects in the case for example, of an unfavorable position of the defect. For a series of different types of defects, criteria have been developed in the form of delay time measurement and phase evaluation of ultrasonic impulses, which enable in many cases a differentiation of the defects and a determination of the defect size. Although it has not been possible until now to clear up completely all the effects involved, the data obtained in the course of the investigations represent a definite contribution to the improvement of the evaluation of ultrasonic test results.

  • Supplemental Notes:
    • 9th World Conference on Non-Destructive Testing, Melbourne, 19-23 November 1979.
  • Corporate Authors:

    World Conference on Non-Destructive Testing

    Parkville, Victoria,   Australia 
  • Authors:
    • Proegler, H
  • Publication Date: 1979

Media Info

  • Pagination: 8 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00331626
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Report/Paper Numbers: Paper 3B-3
  • Files: TRIS
  • Created Date: Jun 12 1981 12:00AM