Abstract
Behavior of corrosion fatigue crack propagation in squeeze cast Al-Si-Mg-Cu aluminum alloy, AC8A-T6, was investigated under the stress ratio of 0. 1, triangular waveform and testing frequency of 10Hz in 3. 0% saline solution using the compact tension specimens with side grooves. Corrosion fatigue crack propagation is affected by the initial stress intensity factor range, ΔKi, as the experiment was started. Path of crack propagation during corrosion fatigue showed the dependency on the microstructure consisted of the dendrite and eutectic spheroidal silicon. Corrosion fatigue crack propagated mainly along the eutectic structure and deviations in the path were larger than those under the test in air.
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