|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Thermo-mechanical Response of Materials with Special Emphasis on In-situ Techniques
||An Analysis of Thermo-mechanical Fatigue Crack Growth in the Titanium Alloy Ti-6246
||Jennie Palmer, Jonathan Jones, Mark Whittaker, Steve Williams
|On-Site Speaker (Planned)
Within the gas turbine engine, the high transient thermal stresses developed due to variations in power requirements during a typical flight cycle give rise to the phenomenon of thermo-mechanical fatigue (TMF). Development of TMF crack growth test techniques has been undertaken on high performance titanium alloys, in which diverse phasing (φ) between mechanical loading and temperature has been investigated. In addition, factors affecting the TMF behaviour of Ti-6246, including peak temperature, minimum temperature and temperature range have also been explored. Thermography has been integrated into the TMF crack growth test setups of Ti-6246 to provide valuable insight into unknown variables including preferential crack tip heating within an induction coil. Furthermore, the use of thermography in-situ not only allows for the measurement of thermo-mechanical properties, but also provides complete oversight of thermal peaks, gradients and hot/cold spots across the area surrounding the crack plane.
||Planned: Supplemental Proceedings volume