| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Accelerated Discovery and Insertion of Next Generation Structural Materials
|
| Presentation Title |
Tuning Chemistry for Eutectic Strengthening of LBPF Al Alloys |
| Author(s) |
Rayna Mehta, Timothy Weihs |
| On-Site Speaker (Planned) |
Rayna Mehta |
| Abstract Scope |
Traditional post-processing of additively manufactured Al-alloys involves solution treatment and aging for stress relief and increased strength. This removes the very fine eutectic microstructure caused by the rapid cooling rates of LPBF. However, this eutectic cell structure provides significant strength to the alloy, giving higher thermal stability and strength retention above 200C. In order to optimize the alloy design, we introduce a method to mimic this fine microstructure using sputter deposition of thick foils and laser melting of the foils post deposition. Within a single foil, we can significantly vary chemical composition, allowing for faster discovery of promising chemistries. Here, we focus on the Al-Si system, characterizing the size and thermal stability of the eutectic cells and mechanical properties like hardness and tensile strength. Through this methodology, we hope to accelerate discovery of a range of compositions that yield superior strength and stability at higher temperatures. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Titanium, Mechanical Properties, Characterization |