CRACK PROPAGATION IN ALUMINUM ALLOYS UNDER HIGH-AMPLITUDE CYCLIC LOAD

Crack propagation studies were conducted on a variety of structural aluminum alloys under high stress-intensity amplitude cyclic load (delta K greater than 10 ksi square root of in.). The alloys under investigation included 2219-T87, 5456-H321, 6061-T651, 7005-T63, 7039-T6X31, and 7106-T63. The yield strengths of these alloys ranged from 34 to 55 ksi. Tests were conducted in ambient room air and in 3.5-percent NaCl saltwater environments. Data are presented on log-log coordinates in terms of fatigue crack growth rate (da/dN) as a function of the stress-intensity factor range (delta K). (Author)

• Corporate Authors:

  Naval Research Laboratory

  Stennis Space Center, MS  United States  39529-5004
• Authors:
  • Crooker, T W
• Publication Date: 1971-7-12

Media Info

• Pagination: 20 p.

Subject/Index Terms

• TRT Terms: Cracking; Fatigue cracking; Fracture mechanics; Repeated loads
• Uncontrolled Terms: Crack propagation
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00024767
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: NRL-7286
• Files: TRIS
• Created Date: Jan 14 1972 12:00AM