Accession Number:

AD0269347

Title:

THE EFFECT OF RESIDUAL STRAINS UPON THE ROTATING-BEAM FATIGUE PROPERTIES OF SOME ALUMINUM ALLOYS

Descriptive Note:

Corporate Author:

ALUMINUM CO OF AMERICA CLEVELAND OHIO

Personal Author(s):

Report Date:

1960-09-30

Pagination or Media Count:

1.0

Abstract:

An attempt was made to demonstrate to what extent the fatigue strength of some Al alloys 6061-T6 and 7075-T6 is affected by changes in the strain, stress, or pattern in rod samples containing residual surface strain and also by inducing strains into notched specimens by preloading in either tension or compression prior to fatigue testing. Tests indicate that tensile residual surface strains in samples of 7075-T6 rod have no effect upon the rotating-beam fatigue properties of smooth or notched specimens, whereas compressive residual surface strains seem to increase the fatigue properties appreciably. The data also show that strains induced in notched specimens of 6061-T6 and 7075-T6 alloys have to be of rather large magnitude before they affect the fatigue properties. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE