ACOUSTIC EMISSION AS A TECHNIQUE FOR NONDESTRUCTIVE TESTING

A PROMISING METHOD FOR NONDESTRUCTIVE TESTING AND INSPECTION IS TO OBSERVE THE ACOUSTIC EMISSION FROM MATERIALS WHEN THEY ARE STRESSED. OBSERVATIONS CAN BE MADE ON TENSILE SPECIMENS OR ON MANUFACTURED PARTS. EXCEPT FOR THE NOISE PRODUCED BY CRACK NUCLEATION OR PROPAGATION, THE EXACT MECHANISMS WHICH CAUSE ACOUSTIC EMISSION ARE NOT CLEAR AT THE PRESENT TIME. THE AMOUNT OF NOISE HAS BEEN SHOWN TO BE DEPENDENT UPON MICROSTRUCTURE AND THE LEVEL OF THE APPLIED STRESS. THE TECHNIQUE APPEARS TO OFFER CONSIDERABLE PROMISE FOR THE "IN-SERVICE" MONITORING OF CRITICAL STRUCTURES. /AUTHOR/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00255327
• Supplemental Notes:
  • Vol 28, No 2, PP 43-47, 11 FIG, 13 REF
• Authors:
  • Frederick, J R
• Publication Date: 1970-2

Media Info

• Serial:
  • Materials Evaluation
  • Publisher: American Society for Nondestructive Testing
  • ISSN: 0025-5327

Subject/Index Terms

• TRT Terms: Acoustics; Cracking; Machines; Mechanical relaxation; Microstructure; Noise; Nondestructive tests; Specimens; Stresses; Tension
• Uncontrolled Terms: Crack propagation; Tensile stress
• Old TRIS Terms: Mechanisms
• Subject Areas: Environment; Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00216949
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 13 1970 12:00AM