The fretting fatigue of ZSGH4169 Nickel⁃based superalloy dovetail structure was studied under different temperatures and loads.It was found that under different working conditions,the fretting fatigue cracks were generated at the lower edge of the mortise contact area,and cracks were generated on both sides.The fretting fatigue life of dovetail structure decreased significantly with the increase of test temperature and load.Both temperature and load affected the slip amplitude and the fretting fatigue life decreased with the increase of slip amplitude.The high⁃temperature fretting fatigue life prediction model containing fretting fatigue parameters was used to verify the fretting fatigue test of ZSGH4169,and the predicted life was within the double error band.
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