MODERN NON-DESTRUCTIVE METHODS FOR MATERIALS TESTING

In the present state of technique there exists no process of non-destructive testing which can be generally applied to the examination of several types of flaw. It is the character of the latter which decides whether or not a particular method of detection shall be employed. The shape of the parts under inspection, in addition to their dimensions, method of manufacture, and the type of metal from which they are made are also important factors, owing to the limitations which they impose. For these reasons, the present report is confined to a simple description, on the technological level, of the principles which form the basis of the methods of detection most widely used on an industrial scale; it is concerned only with their application to metallic specimens, and more particularly to those consisting of ferrous metals, which are by far the most commonly used in railway practice. Then too, the report provides no description of the apparatus used. All the methods used for the detection of internal flaws are based on a common principle; energy is supplied to the part under investigation and the way in which this is transmitted through the metal reveals whether the part is sound or not, or even makes it possible to determine the size of the flaws, and sometimes their shape. The form of energy transmitted to the test piece can therefore serve as a basis for the logical classification of processes adopted in the report.

• Supplemental Notes:
  • Restrictions on the use of this document are contained in the explanatory material.
• Corporate Authors:

  International Union of Railways

  Office of Research and Experiments
  Utrecht,   Netherlands 
• Publication Date: 1955-3

Media Info

• Pagination: 34 p.

Subject/Index Terms

• TRT Terms: Cracking; Fatigue (Mechanics); Fatigue cracking; Flaw detection; Inspection; Metallurgy; Nondestructive tests; Steel; Ultrasonic tests; X ray analysis
• Uncontrolled Terms: Crack propagation
• Old TRIS Terms: Fatigue flaws; Gamma ray inspection; Question e29; Steel metallurgy; X-ray inspection
• Subject Areas: Materials; Railroads;

Filing Info

• Accession Number: 00052741
• Record Type: Publication
• Source Agency: International Union of Railways
• Report/Paper Numbers: E29/CR 1/E
• Files: TRIS
• Created Date: Jul 8 1994 12:00AM