|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||GAT-2017 (Gamma Alloys Technology - 2017)
||CAE-based Analysis of Structural Integrity for an Industrial Gas Turbine Blade Made from TiAl Alloy
||Omid Sedaghat, Siavash Zamani, Saeed Asadi, Fatemeh Heydari, Ali Bakhshi
|On-Site Speaker (Planned)
Titanium Aluminide alloys deputes a promising solution for substitution of current Ni-based superalloys with new class of high temperature light weight alloys. In the present study, last stage blade of an industrial gas turbine was selected and service condition was simulated for the TiAl blade. To do so, thermo-physical properties of selected alloy were extracted to find temperature and stress distribution profiles during engine operation using CFD and FEM analyses. In the next step, moreover to vibrational analysis, creep damage mechanism was studied and analyzed to characterize the reliability according to the blade design criteria and comprehensive comparison was made between performances of selected TiAl alloy in contrast with previous Ni-based superalloy. Results show that stresses level could be significantly lowered by using TiAl alloy and advantages would be achieved in damage mechanisms controlling. However design specifications should be reviewed both in turbine side and current TiAl alloys side.
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