Accession Number : AD0769467

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

Corporate Author : NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER ANNAPOLIS MD

Personal Author(s) : Chu,H. P.

Report Date : OCT 1973

Pagination or Media Count : 28

Abstract : 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. (Author)

Descriptors :   (*Aluminum alloys, *Fatigue(Mechanics)), (*Stress corrosion, Aluminum alloys), Crack propagation, Sea water, Ship hulls

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE