Accession Number:

AD0728385

Title:

Crack Propagation in Aluminum Alloys Under High-Amplitude Cyclic Load

Descriptive Note:

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s):

• Crooker, T. W.

Report Date:

1971-07-12

Pagination or Media Count:

19.0

Abstract:

Crack propagation studies were conducted on a variety of structural aluminum alloys under high stress-intensity amplitude cyclic load delta K 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 dadN as a function of the stress-intensity factor range delta K.

Descriptors:

• *ALUMINUM ALLOYS
• CORROSION
• FRACTURE(MECHANICS)
• CRACK PROPAGATION
• FATIGUE(MECHANICS)

Subject Categories:

• Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE