This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Influence of Retained Austenite on Fatigue Performance of Carburized Gears
Technical Paper
2019-28-0102
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
SAE 8620 and 20CrMo materials were subjected to carburizing process to obtain the identical hardened layer of HRC 61-64. The carburized surface and core properties of the materials were examined and characterized through optical microstructure to measure the presence of cementite carbides and Retained Austenite (RA). From the results, it was found that the SAE 8620 and 20CrMo materials have 10 % and 14% of RA respectively. Whereas, the core and case structure were free from network carbides. The fatigue test was conducted to correlate the RA and fatigue strength of the materials. It was revealed that material with lower RA has higher fatigue strength than material with higher RA. Higher amount of retained austenite leads to reduction in amount of martensitic and compressive residual stress attributed to lower the contact fatigue strength. Untransformed austenite is metastable and is transformed to untempered martensite, which causes brittleness to the component and leads to premature failure.
Authors
Citation
Ramasamy, R., Sivathanu, S., Neelakandan, V., Ganesan, T. et al., "Influence of Retained Austenite on Fatigue Performance of Carburized Gears," SAE Technical Paper 2019-28-0102, 2019, https://doi.org/10.4271/2019-28-0102.Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 |
Also In
References
- Kruszynski , W. and Zgorniak , P. Enhancement of Gears Fatigue Properties by Modern Thermo-Chemical Treatment and Grinding Processes Bogdan Mechanics and Mechanical Engineering 12 4 389 397 2008
- Kozyrev , G.V. Effect of RA on Impact Fatigue Strength of Steel 15 12 1064 1066 1973
- Vinokur , B.B. , Kondratyuk , S.E. , Markovskaya , L.I. , Khrunik , R.A. et al. Effect of Retained Austenite on the Contact Fatigue Strength of Carburized Steel 20 11 927 930 1978
- Jeddi , D. and Henri-PaulLieurade Effect of Retained Austenite on High Cycle Fatigue Behavior of Carburized 14NiCr11 Steel Procedia Engineering 2 1 1927 1936 April 2010
- Zaccone , M.A. and Krauss , G. Fatigue and Strain Hardening of Simulated Case Microstructures in Carburized Steels Heat Treatment and Surface Engineering Krauss G. Metals Park, OH ASM International 1988 285 290
- Wise , J.P. , Krauss , G. , and Matloc , D.K. Microstructure and Fatigue Resistance of Carburized Steels 20th ASM Heat Treating Society Conference Proceedings October 9-12, 2000 St. Louis, MO