| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys II
|
| Presentation Title |
J-48: Mechanical Properties and Dislocation Activities of B2 High-Entropy Intermetallic Compounds |
| Author(s) |
Ya-Jing Lee, Ting-Ying Shih, Cheng-Yuan Tsai, Shou-Yi Chang |
| On-Site Speaker (Planned) |
Ya-Jing Lee |
| Abstract Scope |
Light-weight intermetallic compounds of great interest have been developed for decades for potential applications to aerospace industry. Although they have the advantage of high yield strength, however, the problem of low ductility remains. In this study, NiTi- and TiAl-based, ordered B2-phase high-entropy intermetallic compounds were hence developed. Their macro-to-nanoscale mechanical behaviors were investigated by using the compression tests of bulks, micropillars and nanopillars. The influence of multicomponent-altered structure ordering on dislocation activities was studied by molecular dynamics simulations. Experimental results indicated the uniform deformation, good plasticity and high work hardening of the high-entropy intermetallic compounds owing to the multiple slips of short dislocations than the long slips of complete dislocations. Cyclic compression at elevated temperatures caused the recovery of the small defects. Molecular dynamics simulations also suggested the plastic deformation mediated by the small-range activities of many short dislocations and the small-step motion of many neighboring atoms. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Mechanical Properties, Modeling and Simulation |