Fatigue Tests of Nodular Cast Iron at High and Low Frequency Loading
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The paper deals with the comparison of fatigue tests of nodular cast iron at high and low frequency cyclic loading. Fatigue tests were realised at high and low frequency sinusoidal cyclic push-pull loading (stress ratio R = –1) at ambient temperature (T = 20 +/- 5 °C). High frequency fatigue tests were carried out with using the ultrasonic fatigue testing device KAUP-ZU (frequency f = 20 kHz); low frequency fatigue tests were carried out with using the fatigue experimental machine Zwick/Roell Amsler 150HFP 5100 (frequency f 120 Hz).
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