Analysis of fatigue resistance improvements via surface severe plastic deformation
✍ Scribed by K. Dai; L. Shaw
- Publisher
- Elsevier Science
- Year
- 2008
- Tongue
- English
- Weight
- 777 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0142-1123
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✦ Synopsis
Numerical simulations have been performed to analyze the individual contributions of the nanocrystalline surface layer, residual compressive stresses, and a work-hardened surface region to the improved fatigue limit of a nickel alloy subjected to the surface nanocrystallization and hardening (SNH) treatment. The contributions of the nanocrystalline surface layer and work-hardened surface region have been separated from that of residual compressive stresses. The study suggests that the nanocrystalline surface layer and work-hardened surface region play a significant role in enhancing the fatigue limit of the SNH-processed nickel alloy. In contrast, less contribution is provided by residual compressive stresses.