Effect of broaching machining parameters, residual stresses and cold work on fatigue life of Ni-based turbine disk P/M alloy at 650 °C

Machining parameters can influence fatigue life by altering residual stresses, cold work and surface roughness. A study was performed to examine the effect of various broaching machining on high temperature lives a nickel-based disk alloy. The tool wear speed were studied their roughness quantified. These variables shown have substantial lives, failure mode type location. relationships between these crack initiation mechanisms are detailed. Statistical analyses evaluating presented.