Abstract
The objective of this study is to determine very long life fatigue and near threshold fatigue crack growth behaviors of 7075/T6 and 6061/T6 Al-alloys using piezoelectric accelerated fatigue at 19.5KHz. The experimental results show the fatigue failure can occur beyond 107, even 109 cycles, and endurance limits could not be obtained in the Al-alloys until 109 cycles. Fatigue voids are noticed on fatigue fracture in both alloys. By using scanning electron microscopy (SEM), the crack initiation and propagation behaviors have been examined. Fatigue crack growth rates of small cr acks in the Al-alloys are found to be greater than those of large cracks at the same stress intensity factor range.
| Original language | English |
|---|---|
| Pages (from-to) | 1287-1294 |
| Number of pages | 8 |
| Journal | Key Engineering Materials |
| Volume | 261-263 |
| Issue number | II |
| DOIs | |
| Publication status | Published - 2004 |
| Externally published | Yes |
| Event | Advances in Fracture and Failure Prevention: Proceedings of the Fifth International Conference on Fracture and Strength of Solids (FEOFS2003): Second International Conference on Physics and Chemistry of Fracture and Failure Prevention (2nd ICPCF) - Sendai, Japan Duration: Oct 20 2003 → Oct 22 2003 |
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering