The Effects of Super Finishing on Bending Fatigue


A super finishing study was designed and conducted for bending fatigue. AMS6265 parts were created: with and without super finishing. Bending fatigue was tested using Single Tooth Fatigue (STF) and RR Moore rotating beam methods. The STF parts were designed with tooth geometry replicating a spiral bevel gear section. Two lots of material were processed. Thus, a minimum of two carburized and hardened lots, two shot peen batches and two super finishing cycles (if applicable) were processed per sample group. A detailed metallurgical evaluation was performed to characterize the material and compare to actual spiral bevel gears. Analysis of the test data concluded no statistical difference in bending fatigue strength.
ISBN: 1-55589-883-1 Pages: 14
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