Fretting fatigue strength tests of aluminum alloy (JIS A7N01) specimens with surface treatments (fine particle peening, burnishing and solid lubricant film) were carried out using an electromagnetic fatigue testing machine. From the in-situ SEM observations of fretting fatigue process, the fretting fatigue crack nucleated earlier in the order of the fine particle peening, untreated, burnishing and solid lubricant film It was found that burnishing with smooth surface and high cornpressive residual stress effectively delayed the fretting fatigue crack nucleation and propagation It was also found that solid lubricant film with low frictional coefficient effectively delayed them.
