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Fatigue Performance and Residual Stress of Carburized Gear Steels Part II: Fatigue Performance
ISSN: 1946-3979, e-ISSN: 1946-3987
Published April 14, 2008 by SAE International in United States
Citation: John, J., Li, K., and Li, H., "Fatigue Performance and Residual Stress of Carburized Gear Steels Part II: Fatigue Performance," SAE Int. J. Mater. Manf. 1(1):709-717, 2009, https://doi.org/10.4271/2008-01-1423.
Part II of the paper focuses on fatigue tests of four specific gear steels: SAE 4320, SAE 8822, PS18, and 20MnCr5. Fatigue life, S-N curves are experimentally generated for all steels at low cycle fatigue and high cycle fatigue. The failure stresses at cycle one and slope of the linear portion of S-N curves are determined based on the experimental data. Endurance limits were tested. Uncertainty in the fatigue data is analyzed in details and values of sigma are calculated. Design curves were estimated based on the fatigue test results.