Abstract
1. Within the range 500–10,000 Hz the cyclic loading frequency has practically no effect on the fatigue resistance of the IMV-2 alloy, while for the AMg6N alloy at an increase of loading frequency to 10 kHz the fatigue limit of smooth specimens increases monotonically. 2. The effective stress intensity coefficients and the coefficients of the welding effect do not change during transition to higher loading frequencies which permits them to be determined from the results of high-frequency tests on the required loading bases. 3. On each of the investigated loading frequencies the scatter of fatigue life values of broken welded specimens and of specimens with stress concentrators is greater than that of smooth specimens of the initial material. This must be taken into account in calculating and predicting the cyclic fatigue life of structural elements and machine components.
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