Examination of Pitting Fatigue in Carburized Steels with Controlled Retained Austenite Fractions 2006-01-0896
The effects of several variables on pitting fatigue life of carburized steels were analyzed using a geared roller test machine (GRTM). The material variables that were primarily used to influence retained austenite include aim surface carbon concentration (0.8 % and 0.95 %), alloy (SAE 4320 and a modified SAE 4122), and cold treatment (performed on one material condition per alloy). Testing variables included contact stress in addition to a variation in lambda ratio (oil film thickness/surface roughness), arising from variation in roughness among the machined surfaces. Test results are presented, and differences in performance are considered in terms of material and testing variables. A primary observation from these results is an improvement in contact fatigue resistance apparently arising from cold-treatment and the associated reduction of retained austenite at the surface.
Citation: Wagar, R., Speer, J., Matlock, D., and Mendez, P., "Examination of Pitting Fatigue in Carburized Steels with Controlled Retained Austenite Fractions," SAE Technical Paper 2006-01-0896, 2006, https://doi.org/10.4271/2006-01-0896. Download Citation
Author(s):
Ryan M. Wagar, John G. Speer, David K. Matlock, Patricio F. Mendez
Affiliated:
Colorado School of Mines
Pages: 10
Event:
SAE 2006 World Congress & Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Innovations in Steel Sheet Products & Processing & Steel Bar Products-SP-2035, SAE 2006 Transactions Journal of Materials and Manufacturing-V115-5
Related Topics:
Corrosion
Fatigue
Alloys
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