Crack Propagation in Aluminum Alloys Under High-Amplitude Cyclic Load
NAVAL RESEARCH LAB WASHINGTON DC
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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.
- Properties of Metals and Alloys