Effect of shot peening on surface fatigue life of carburized and hardened AISI 9310 spur gears
Dennis P. Townsend, Erwin V. Zaretsky, United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch
National Aeronautics and Space Administration, Scientific and Technical Branch, 1982 - Technology & Engineering - 14 pages
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9310 spur gears AISI 9310 gear AISI 9310 material AISI 9310 spur bending stress carburized and hardened confidence number diameter was 8.89 diffraction residual stress equation fiberglass film thickness function of depth gear pitch diameter Gear surface fatigue gear teeth gear temperature gear tooth surface gearbox gears are shown ground AISI 9310 ground and shot-peened ground tooth surfaces groups were manufactured hardened AISI 9310 Lewis Research Center load vanes maximum Hertz stress maximum shear stress measured residual stress NASA outlet oil temperature peened gears percent pitting fatigue lives residual compressive stress residual stress measurements result rolling-element fatigue shot-peened AISI 9310 shot-peened gears exhibited shown in figure Smax standard and shot-peened standard gears standard ground AISI standard ground tooth stress of 1.71 synthetic paraffinic oil temperature of 350 Test conditions test gears test rig Tmax tooth root torque typical fatigue spall U.S. customary units X-ray diffraction residual