| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
TMS-DGM Symposium: A Joint US-European Symposium on Linking Basic Science to Advances in Manufacturing of Lightweight Metals
|
| Presentation Title |
Al-Fe-Si Phase Stabilization Using Experimentally Validated Computational Thermodynamics |
| Author(s) |
Sujeily Soto-Medina, Biswas Rijal, Lilong Zhu, Richard Hennig, Michele V. Manuel |
| On-Site Speaker (Planned) |
Sujeily Soto-Medina |
| Abstract Scope |
The Al-Fe-Si alloy system provides an opportunity for the development of low-cost, lightweight, high-temperature alloys. Specifically, the τ11-Al4Fe1.7Si ternary intermetallic phase is a high temperature lightweight phase with the potential to demonstrate both high-strength and good corrosion resistance. However, this phase exhibits a small compositional range of stability. The present study discusses a design approach integrating computational and experimental work to increase the stability range of τ11-Al4Fe1.7Si phase with additions of Mn. Density Functional Theory calculations were performed to predict the favorable Mn composition and site occupancies in τ11. The calculations guided the diffusion couple and equilibrated alloy experiments. The diffusion couple experiments measured the phase boundary of the τ11 with addition of Mn. The results demonstrate that the stability range of the τ11 phase can be increased by an alloy design approach that identifies a pathway for energetic and entropic stabilization. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Aluminum, ICME, |