tree slot

The turbine disk has a high speed during the working, which can reach more than 15,000 r/min. 9 Therefore, the fir-tree slot is subjected to a great centrifugal force in high temperature working environment, and it is easy to produce fatigue damage at the root of fir-tree slot. 5–7,10,11 Meanwhile, the dimensions of aero-engine turbine disk slots is small, the width d may be less than 4 mm ...