Rolling Contact Fatigue Properties of SAE 8620 Steel after Case Carburizing
| Autor: | Mao-qiu Wang, Le Xu, Cao Yanguang, Gou-qiang Zhang, Jie Shi |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Metallurgy Metals and Alloys Rolling contact fatigue 02 engineering and technology 021001 nanoscience & nanotechnology Carburizing 020303 mechanical engineering & transports Contact mechanics stomatognathic system 0203 mechanical engineering Mechanics of Materials Metallic materials Materials Chemistry Shear stress 0210 nano-technology Contact area Case hardening |
| Zdroj: | Journal of Iron and Steel Research International. 23:711-716 |
| ISSN: | 2210-3988 1006-706X |
| Popis: | Rolling contact fatigue (RCF) properties of SAE 8620 steel after case carburizing have been investigated under two contact stresses of 4.0 and 5.5 GPa. Results show that the RCF life ranges from 2.5 × 106 to 3 × 107 cycles under the contact stress of 5.5 GPa, while it can be more than 1 × 108 cycles under the contact stress of 4.0 GPa. The rated fatigue life L10 (lives with the 10% failure) is also drastically shortened from 9.8 × 106 to 5.4 × 105 cycles when the contact stress is increased from 4.0 to 5.5 GPa. Theoretical calculations and fractographs show that the maximum shear stress and the contact area increase with increasing the contact stress, making RCF tend to occur earlier. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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