|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Energy Materials 2017: Materials for Gas Turbines
||Efforts to Introduce TiAl Alloys for Gas Turbine Applications
||Ji Zhang, Helena Oskarsson
|On-Site Speaker (Planned)
The development of more efficient gas turbins is where the titanium aluminide alloys come into play as improved fuel efficiency always translates into a need for less weight and higher operating temperatures. This presentation reviews the efforts of China Iron and Steel Research Institute Group and Siemens Industrial Turbomachinery AB to introduce this new material into the low pressure turbine design. The major threats to in-service integrity for TiAl alloys, especially for those made by casting, particular those are posed by the lack of low temperature ductility, acceleration of high temperature creep and high cycle fatigue randomness have been considered and evaluated by laboratory and rig tests. Accordingly, this study demonstrated that developing cast lamellar microstructures with lamellar interfaces parallel to the casting surfaces and meanwhile employing the effects of minor Carbon additions is significant to overcome the TiAl alloys’ unfavorable complications for gas turbine applications.
||Planned: Stand-alone book in which only your symposium’s papers would appear (indicate title in comments section below)