| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Titanium Technology
|
| Presentation Title |
Competing Fatigue Failures, Complex S-N Fatigue Behavior and Reciprocal Relationships in Ti-6Al-4V Titanium Alloy |
| Author(s) |
K. S. Ravi Chandran |
| On-Site Speaker (Planned) |
K. S. Ravi Chandran |
| Abstract Scope |
Since the discovery of metal fatigue, it is assumed that the fatigue behavior of metals is characterized by a single and asymptotic S-N (stress-fatigue life) fatigue curve. Our recent fatigue research, however, shows that the S-N behavior of titanium alloys is quite complicated due to the duality of fatigue or competing fatigue failure mechanisms. Such failure mechanisms arise from the competition from surface-initiated and internal-initiated cracks, caused by microstructural aspects and aggravated by environmental (air versus vacuum). In this presentation, why and how a competing fatigue failure behavior arises in titanium alloys is illustrated. More recent results on the high cycle fatigue of Ti-6Al-4V alloy, in air and vacuum environments are discussed. This phenomenon can occur in any metal and is not an exception to titanium alloy. It is shown that the duality or competing failure phenomenon requires a rethinking of the classical S-N fatigue phenomenon. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Titanium, Mechanical Properties, |