|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||GAT-2017 (Gamma Alloys Technology - 2017)
||Methodological Discussion on Enhancing the Temperature Tolerance of TiAl Alloys
||Ji Zhang, Xiwen Zhang, Jing Zhu
|On-Site Speaker (Planned)
Light-weight gamma TiAl alloys are expected to be the substitutes for Ni-based superalloys, whereas so far not competitive enough because of the high cost and limited application temperature range. The efforts to increase the high temperature strength retention of TiAl alloys have produced many successful examples. Among those, developing higher Nb containing alloys and minor additions of C seem more likely to play the role in the application extension of TiAl alloys. This presentation will assess the effectiveness and drawback of the both approaches based the creep performance and related thermal microstructure stability. It has been noticed that the TiAl-Nb alloys are not preponderant in long-term creep resistance since their lamellar structures are even less stable than those in conventional TiAl-C alloys. Therefore, the influence of Nb or Al segregation on microstructure stability and the effects of adding small amount of C in TiAl-Nb alloys are examined and discussed accordingly.
||Planned: Stand-alone book in which only your symposium’s papers would appear (indicate title in comments section below)