Influence of Temperature on Surface Integrity for Typical Machining Processes in Aero Engine Manufacture

Components such as turbine discs in the high pressure turbine part of the aero engine suffer high mechanical and thermal loads during service and are critical to the safety of the aircraft. Therefore, in aero engine manufacture, the surface integrity has established as a complex quality measure regarding not only features on the surface but also the condition of the subsurface. The integrity at the machined surface on the one hand depends on the material properties of the part and on the other hand on the machining parameters as well as the condition of the cutting edge. This paper intends to contribute to the understanding of the physical effects during the cutting process and uses the temperature in the cutting zone as a measure to connect the cutting parameters and selected measures of the surface integrity.