| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Frontiers in Solidification Science VIII
|
| Presentation Title |
Effects of Process Conditions and Morphology Evolution on Microsegregation During Solidification: A Combined Phase-field and Experimental Study |
| Author(s) |
Zhenjie Yao, David Montiel, Mei Li, Katsuyo Thornton, John Allison |
| On-Site Speaker (Planned) |
Zhenjie Yao |
| Abstract Scope |
The microsegregation that occurs in Al-Cu alloys during different solidification processes was investigated using experimental measurements and phase-field simulations. Quantitative measurements of microsegregation were conducted using Electron Probe Micro-Analysis (EPMA). The EPMA results showed pronounced microsegregation of Cu in the center of dendrites that could not be readily explained by conventional analytical expressions. The microsegregation and dendrite morphological evolution were simulated using the quantitative phase-field model developed by Echebarria et al. To this end, a new alloy solidification application was developed within the high-performance, open-source PRISMS-PF framework. This application was then used to simulate solidification of Al-Cu alloys in 2D and 3D. The combined experimental and PRISMS-PF simulation study demonstrated that microsegregation is dependent on the process conditions and evolution of morphology. These findings were used to develop an improved analytical microsegregation model that can accurately predict microsegregation over a wide range of solidification conditions and alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Solidification, Aluminum, Computational Materials Science & Engineering |