|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||GAT-2017 (Gamma Alloys Technology - 2017)
||Origin of Enhanced Ductility of TiAl Alloys: A Hybrid Study on the Deformation Behavior of Gamma Phase in TiAl Alloys Using In-situ Transmission Electron Microscopy Experiments and Molecular Dynamics
||Seong-Woong Kim, Seung-Hwa Ryu, Jaemin Kim, Young-Sang Na, Seung-Eon Kim, Jong-Taek Yeom, Andrew Minor
|On-Site Speaker (Planned)
An in-situ transmission electron microscopy study was conducted at room temperature to understand an underlying mechanism on room temperature ductility of TiAl alloys. Also, molecular dynamics simulation was conducted to calculate the stacking fault energy of TiAl alloys and to show which deformation mode is dominant. From in-situ straining transmission electron microscopy experiments, it was revealed that deformation mode is different between the TiAl alloys with/without room temperature ductility. The γ lamellar of TiAl alloys having room temperature ductility was deformed by slip. However, the γ lamellar of TiAl alloys without room temperature ductility was deformed by deformation twin. 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. The important microstructural factors for room temperature ductility was suggested.
||Planned: Stand-alone book in which only your symposium’s papers would appear (indicate title in comments section below)