About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Advances in Titanium Technology
|
| Presentation Title |
Influence of Processing and Thermomechanical Loading on Cold Dwell Fatigue Behaviour of Titanium Alloys: Rolls Royce, UK |
| Author(s) |
Kate Fox, M. Mulyadi |
| On-Site Speaker (Planned) |
Kate Fox |
| Abstract Scope |
Cold dwell fatigue is a significant failure mode which can occur in many of the titanium alloys traditionally used for aero-engine applications. Much of the laboratory and rig-scale mechanical testing using a ‘dwell’ at peak load has traditionally been isothermal and to a single peak load level. However, in real components, loading cycles can be complex and temperatures are generally not isothermal. Data will be presented using laboratory fatigue testing to simulate complex loading cycles and thermomechanical fatigue conditions under dwell loading using strain monitoring to assess damage accumulation in three different titanium alloys. The incorporation of a ‘hot soak’ above 200°C and a loading step is seen to significantly affect the damage accumulation under dwell loading for the conditions utilised for the testing. Further work is required to fully understand the mechanism by which this occurs. |