Fatigue Crack Propagation in a 5456-H117 Aluminum Alloy in Air and Sea Water

[+] Author and Article Information
H. P. Chu

Naval Ship Research and Development Center, Annapolis, Md.

J. Eng. Mater. Technol 96(4), 261-267 (Oct 01, 1974) (7 pages) doi:10.1115/1.3443240 History: Received January 11, 1974; Revised February 01, 1974; Online August 17, 2010


Fatigue data on a 5456-H117 aluminum alloy have been obtained in air and sea water by fracture mechanics methods. It is found that the presence of sea water increases the crack growth rates and lowers the threshold stress intensity. The data for five stress ratios are correlated with two empirical equations. The effect of sea water on fatigue cracking is also examined by electron fractographs.

Copyright © 1974 by ASME
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