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

加工参数可以通过改变残余应力、冷加工和表面粗糙度来影响疲劳寿命。进行了一项研究，以检查各种拉削加工参数对镍基圆盘合金高温疲劳寿命的影响。研究了刀具磨损和拉削速度的影响，并量化了它们对残余应力、冷加工和表面粗糙度的影响。这些变量被证明对疲劳寿命、失效模式类型和位置有重大影响。详细介绍了这些参数与疲劳裂纹萌生机制之间的关系。提供了评估这些关系的统计分析。