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.
- 9th World Conference on Non-Destructive Testing, Melbourne, 19-23 November 1979.
World Conference on Non-Destructive TestingParkville, Victoria, Australia
- Proegler, H
- Publication Date: 1979
- Pagination: 8 p.
- TRT Terms: Defects; Inspection; Nondestructive tests; Radiography; Ultrasonic tests; Weld tests; Welds
- Uncontrolled Terms: Weld defects
- Old TRIS Terms: Weld inspection
- Subject Areas: Marine Transportation; Materials;
- 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