Effect of Foreign Object Damage on the Fatigue Performance of Stainless Steel Blades Under Pre-Corrosion Conditions

Aeroengine blades are prone to corrosion and foreign object damage (FOD) during service, leading to the risk of premature fatigue failure and impacting flight safety. The size of the blade’s damage depends mainly on the impact velocity and the size of the foreign object. Therefore, this paper studies the influence of foreign object damage on the fatigue performance of 13Cr stainless steel blades under corrosive conditions by means of experimental exploration. The results are as follows. Pre-corrosion did not alter the blade’s damage mechanism, but only reduced its impact resistance. The longer the corrosion time, the more the impact resistance of the blade decreased. Pre-corrosion leads to an increase in damage when the simulated blade is impacted, resulting in decreased fatigue performance of the blade. The fatigue limits of the simulated blades pre-corroded for 24 h, 48 h, and 96 h are reduced by approximately 22%, 23%, and 29%, respectively. The research results of this paper can provide data support for the detection of external field damage of aeroengine blades and provide reference for the design of anti-foreign object damage aeroengine blades.