Abstract
In the present investigation the high cycle fatigue behavior of Al6061-T6 aluminum alloy has been investigated at different frequencies. Fatigue tests were conducted at a frequency of 33 Hz and 50 Hz. A constant amplitude rotating bending fatigue experiment was performed at room temperature at a stress ratio of −1. The fatigue limit was tested using the staircase method at 107 cycles. At greater number of cycles, the S–N curve has shown its downward trend compared with the earlier member of cycles. The crack initiation point, crack propagation and sudden failure points were seen on the fractured surfaces. The fractured surfaces also shown uniform spacing of striations.
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