NACA Technical Notes

From Introduction: "The purpose of this paper is to show that the number and location of ears can be computed on the basis of single-crystal behavior and a knowledge of the orientation of the polycrystalline aggregate. Although the proposed method is a general one, only face-centered cubic metals are considered in this paper.

NACA Technical Notes

From Summary: "A general method has been developed for determination of fatigue-crack propagation rates. In order to provide a check on the theoretical predictions and to evaluate certain empirical constants appearing in the expression for the rate of fatigue-crack propagation, an extensive series of tests has been conducted. Sheet specimens, 2 inches and 12 inches wide, of 2024-T3 and 7075-T6 aluminum alloys were tested in repeated tension with constant-amplitude loading.

NACA Technical Notes

Report presenting cross-grain specimens made of 7075-T6 aluminum-alloy extrusion were subjected to repeated axial loads until fatigue cracks of various lengths were formed. The specimens were subjected to static tests to determine the residual static strength

NACA Technical Notes

Report presenting the results of tension and compression tests on 3S aluminum alloy sheet presented together with values of Poisson's ratio in the plastic range

NACA Technical Notes

Report presenting the similarity of Larson-Miller master curves for rupture life and minimum creep rate for aluminum, two aluminum alloys, two steels, and two high-temperature high-strength alloys. The approximate invariance of the product of rupture life and minimum creep rate is also shown for these materials