About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Response of Materials Investigated through Novel In-situ Experiments and Modeling
|
| Presentation Title |
Development of TiAl Alloys for High Temperature Applications |
| Author(s) |
Seong-Woong Kim, Jae-Kwon Kim, Jong-Hoon Kim, Ji Young Kim, Seung-Hwa Ryu, Dongchan Jang, Jae Keun Hong, Seung Eon Kim |
| On-Site Speaker (Planned) |
Seong-Woong Kim |
| Abstract Scope |
Research on developing new TiAl alloys for high temperature (> 900oC) applications is introduced. At KIMS, we have developed new TiAl alloys which have excellent room temperature and high temperature properties. Especially, the new alloy showed excellent oxidation resistance in the temperature range from 900 to 1000oC by forming stable Al2O3 oxidation layer as well as room temperature ductility up to 0.78% solely by casting. The deformation behavior of -phase was investigated using in-situ transmission electron microscopy experiments and molecular dynamics simulation. The difference in deformation mode was explained by stacking fault energy of the TiAl alloys which was calculated by molecular dynamics. Furthermore, the role of lamellar orientation of tensile direction on deformation behavior was examined using Schmid factor of each orientation. Finally, we proposed the important microstructural factors to have room temperature ductility of TiAl alloys. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |