| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior at the Nanoscale V
|
| Presentation Title |
N-7: Effect of Additional Elements on Deformation Mechanism of γ-TiAl |
| Author(s) |
Ji Young Kim, Jong-hun Kim, Jae-Kwon Kim, Taegu Lee, Seung-Hwa Ryu, Dong-chan Jang, Eun Soo Park, Seong-Woong Kim, Seung-Eon Kim |
| On-Site Speaker (Planned) |
Ji Young Kim |
| Abstract Scope |
TiAl alloys have been studied widely as promising candidates for high-temperature applications due to high specific strength and excellent high-temperature properties. However, because of low ductility at room temperature, the applications of γ-TiAl have been hindered. Although numerous studies using alloy design strategies have been performed to improve the room temperature ductility, there is a lack of studies which clarify the effect of composition on deformation mechanism. In the present study, we investigated deformation mechanism depending on additional elements (Nb, Cr) using micro-pillar compression test in scanning electron microscope. Prior to the experiments, we predicted deformation mechanism depending on additional elements and loading directions using molecular dynamic simulation considering stacking fault energy and schmid factor. This study provides theoretical basis for understanding the effect of additional elements on deformation mechanism of γ-TiAl. Furthermore, it is expected to be used as a novel guideline for alloy design with excellent mechanical properties. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |