THE EFFECT OF RESIDUAL STRAINS UPON THE ROTATING-BEAM FATIGUE PROPERTIES OF SOME ALUMINUM ALLOYS
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 1960
- Accession Number
- AD0269347
Entities
People
- J.o. Lyst
Organizations
- Alcoa