EFFECTS OF PURITY ON FATIGUE AND FRACTURE OF 7XXX-T76511 ALUMINUM EXTRUSION

The 7050 and 7049 aluminum alloys were developed by Alcoa and Kaiser Aluminum as improvements over the currently used stress corrosion susceptible high-strength 7075-T6 and 7079-T6 compositions, and over the stress corrosion resistant but lower strength 7075-T73. As part of Lockheed's continuing program to correlate fatigue crack growth with fracture toughness, tests were conducted to compare the effects of various impurity levels (iron and silicon) on the plane strain fracture toughness and fatigue crack propagation rates of these alloys. The lower impurity compositions showed significantly higher toughness.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00218669
• Corporate Authors:

  American Institute of Aeronautics and Astronautics

  1290 Avenue of the Americas
  New York, NY  United States  10019
• Authors:
  • Van Order, J M
  • Krupp, W E
  • Walden, E
  • Ryder, J T
• Publication Date: 1979-5

Media Info

• Features: References;
• Pagination: p. 327-335
• Serial:
  • Journal of Aircraft
  • Volume: 16
  • Issue Number: 5
  • Publisher: American Institute of Aeronautics and Astronautics
  • ISSN: 0021-8669
  • Serial URL: https://arc.aiaa.org/journal/ja

Subject/Index Terms

• TRT Terms: Aircraft materials; Alloys; Aluminum; Aluminum alloys; Cracking; Fatigue (Physiological condition); Fracture mechanics; High strength materials; Light metals
• Uncontrolled Terms: Crack propagation
• Old TRIS Terms: Purity
• Subject Areas: Aviation; Vehicles and Equipment;

Filing Info

• Accession Number: 00301380
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Feb 11 1980 12:00AM