The Effect of Inclusion Size and Distribution on Fatigue of 2024-T4Aluminum.

摘要

Two experiments were performed to determine the effect of inclusion size and distribution on the fatigue strength of 2024aluminum. Rolled, 2024Al sheet was shown to contain about twice as many inclusions larger than 10microns in diameter in the center plane as at the surface. Bending fatigue tests,in which a zero to maximum tensile stress was applied to one surface of a flat specimen cut from the sheet,showed that when the center plane was made the tensile surface,the fatigue life was reduced to half that obtained with the original surface under tension. (Author)