Low cycle fatigue behavior of aluminium 6063 alloy under the cyclic frequency of 0.2 Hz

Abstract Aluminium 6063 alloy is widely utilized as a structural membrane among automobile and aircraft sectors because of its excellent specific strength and formability characteristics. Aluminium alloys which have been employed in the form of aerospace structural components will undergo dynamic loading which leads to the fatigue which is due to mechanical stress and thermal conditions. Considering studies toward the low cycle fatigue behavior of aluminium alloys are particularly narrowed, this investigation sighted to the analysis of fatigue behavior of Al 6063 alloy at the various strain amplitude of 0.4% and 0.8% which performed through the low cycle fatigue testing machine at the frequency rate of 0.2 Hz. The test reveals that for the higher magnitude of 0.8% strain amplitude the fatigue life was shorter as 291 cycles. Mean Stress of the Al6063 samples relies on the crack initiation and value of the mean stress is a vital parameter for determining the fatigue limits. For 0.4% strain amplitude, it took 1735 cycles to fail but there was only cyclic softening has happened, whereas for 0.8% despite the shorter life.