Fatigue Performance of Titanium Alloy Centrifugal Impeller Under Multi-processing State
The fatigue strength of centrifugal impeller is the result of the combined influence of the various characteristic quantities on the blade surface integrity.Different processing parameters lead to distinct states of blade surface integrity,resulting in various fatigue performance.the effects of the precision cutting and shot peening on the fatigue performance of TC11 centrifugal impeller blades is focused.By analyzing the fatigue strength data under different processing conditions of the blade,the impeller's structural features have been optimized and designed.The results show that the fatigue strength of the optimized impeller blade increased approximate 15%under the high-frequency fatigue testing at a cycle number of 3×107,which has an important guidance for optimizing the processing parameters and structural design of the new type centrifugal impeller.
titanium alloycentrifugal impellerssurface integrityfatigue strengthshape and property optimization