Abstract
1. When the loading frequency is increased in the range 600–7500 Hz the endurance characteristics of AMg6BM alloy specimens with stress concentrators in the form of symmetrical transverse round holes change in the following manner: the endurance limit increases and is 23% higher at 7500 Hz compared to the value at 600 Hz; the effective coefficient of stress concentrations is practically the same over the frequency range 600–7500 Hz and is only 7% lower at 7500 Hz compared to the value at 600 Hz; the notch sensitivity increases by 8% when the frequency is increased to 2500 Hz, and then falls by 26% at 7500 Hz compared to the value at 600 Hz. 2. The endurance characteristics of AMg6BM alloy sheets tested at 2000–2500 Hz can be used for calculating the fatigue strength of parts which are subjected to vibrational loads in the frequency range 600–7500 Hz during operation.
Published Version
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