FEATURES OF FATIGUE MECHANISMS CLARIFIED BY SCANNING ELECTRON MICROSCOPY

It is shown how the SEM can extend earlier observations on the origin and development of (a) plastic fatigue, (b) elastic fatigue, and (c) ultrasonic fatigue in metals. New observations bring out especially a "hot spot" phenomenon, details of strain concentrations, and exceptions to the two-stage theories of crack propagation.

• Supplemental Notes:
  • This project was sponsored by Office of Naval Research and the Air Force Materials Laboratory
• Corporate Authors:

  George Washington Transportation Research Institute. Center for Intelligent Systems Research

  ,    
• Authors:
  • MacDonald, D E
  • Wood, W A
• Publication Date: 1971-8

Media Info

• Features: Figures; References;
• Pagination: p. 1-16
• Serial:
  • Issue Number: 9

Subject/Index Terms

• TRT Terms: Cracking; Elasticity (Mechanics); Fatigue (Mechanics); Fatigue cracking; Plastics
• Old TRIS Terms: Elastic fatigue; Plastic fatigue
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00019340
• Record Type: Publication
• Source Agency: Office of Naval Research
• Report/Paper Numbers: Tech Rpt
• Contract Numbers: N00014-67-A-0214-011
• Files: TRIS
• Created Date: Nov 8 1972 12:00AM