A NEW METHOD OF DETECTING FATIGUE CRACK PROPAGATION IN FERROMAGNETIC SPECIMENS

This paper describes a new method for detecting fatigue crack growth in ferromagnetic specimens. This method is similar to the Barkhausen effect type of measurement, where discontinuous voltage pulses are induced in a pickup coil surrounding a specimen when the specimen is magnetized slowly. As a fatigue crack grows, similar voltage pulses are generated. Simultaneous display of the Bakhausen-type magnetic signals and the acoustic emission signals during fatigue crack propagation show that they are correlected. /Author/

• Corporate Authors:

  American Society for Testing and Materials (ASTM)

  100 Barr Harbor Drive, P.O. Box C700
  West Conshohocken, PA  United States  19428-2957
• Authors:
  • Bhattacharya, S
  • Schroeder, K
• Publication Date: 1975-7

Media Info

• Features: Figures; References;
• Pagination: p. 289-291
• Serial:
  • ASTM Journal of Testing and Evaluation
  • Volume: 3
  • Issue Number: 4
  • Publisher: Federal Highway Administration

Subject/Index Terms

• TRT Terms: Acoustic measuring instruments; Acoustics; Cracking; Detection and identification; Detectors; Ferromagnetic materials; Magnetic detectors; Measurement; Mechanical fatigue; Nondestructive tests; Signal to noise ratio; Voltage
• Uncontrolled Terms: Crack propagation
• Old TRIS Terms: Acoustic measurement; Magnetic measurements; Voltage measurement
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00126141
• Record Type: Publication
• Files: TRIS
• Created Date: Oct 18 1975 12:00AM