| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
O-37: The Microstructural Evolution of Ag-39.9at%Cu Eutectic Alloys under Different Cooling Rates |
| Author(s) |
Qingyuan Qin |
| On-Site Speaker (Planned) |
Qingyuan Qin |
| Abstract Scope |
The solidification of most eutectic alloys generally produces two-phase coupled microstructures, which are linked to the intrinsic properties of components and external conditions for solidification. The microstructures of rapidly solidified Ag-39.9at%Cu eutectic alloys have been widely studied, while the research between microstructures and cooling rate is still lacking. We made systematic experiments to study the microstructures of Ag-39.9at%Cu eutectic alloys under different cooling rates by casting into high speed rotating copper wheel and cylindrical copper moulds. SEM and TEM analyses showed the evolution of microstructures from the lamellar structures mixed with abnormal eutectic structures, to the spherical eutectic colonies mixed with abnormal eutectic structures and Ag-rich equiaxed phases, then to the non-segregation solidification structures, as the cooling rate increased. The observed microstructures were very complicated at the intermediate cooling rate, we have tried to explain the formation mechanism on the basis of the SEM images and heat transfer process. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Solidification, |