Frequency effect and influence of testing technique on the fatigue behaviour of quenched and tempered steel and aluminium alloy |
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| Affiliation: | 1. School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore;2. Faculty of Mechanical and Aerospace Engineering, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung 40132, Indonesia;1. Mechanical Engineering, Montanuniversitaet Leoben, Franz-Josef-Strasse 18, Leoben 8700, Austria;2. LEC GmbH, Inffeldgasse 19/II, Graz 8010, Austria |
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| Abstract: | Influences of testing technique and frequency on the fatigue behaviour of 50CrMo4 and EN AW-5083 were investigated. To clarify the effect of test frequency on the fatigue behaviour, tests with 20 kHz and f < 400 Hz were performed. The frequency effect can be caused by temperature, environment and strain rate. For the aluminium alloy, the influence of environment is responsible for the dependence of fatigue lifetime on the frequency. The fatigue lifetime of the steel showed in both environments similar frequency dependency, i.e. the strain rate is assumed to be responsible for the differences in fatigue lifetime. |
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| Keywords: | Very high cycle fatigue Frequency effect Ultrasonic fatigue and conventional testing machines 50CrMo4 EN AW-5083 |
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