Accession Number : AD0718321

Title :   Effect of Tension-Compression Cycling on Fatigue Crack Growth in High-Strength Alloys

Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s) : Crooker, T W

PDF Url : AD0718321

Report Date : 04 Jan 1971

Pagination or Media Count : 13

Abstract : Virtually all of the fatigue crack propagation data reported in the literature for structural alloys are generated under simple zero-tension cycling. The direct application of this data to problems involving large welded structures subjected to operating stress cycles approaching fully-reversed tension-compression is questionable. The present study shows that the compression portion of fully-reversed tension-compression cycling can contribute substantially to fatigue crack growth rates in plate-thickness, medium-to-high- strength alloys. Data from several alloys show a 50 percent increase in fatigue crack growth rates due to tension-compression cycling. The implications of these findings and methods for applying the results of this study are discussed.

Descriptors :   *STEEL, *TITANIUM ALLOYS, CRACK PROPAGATION, FATIGUE(MECHANICS)

Subject Categories : Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE