| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Microstructural and Mechanical Long-term Stability of AM Materials
|
| Presentation Title |
Microstructure Evolution and Creep Property of Laser Powder Bed Fused Hypereutectic Al-16Ce-1Mg Alloy |
| Author(s) |
Haijian Yang, Thinh Huynh, Yongho Sohn, David Weiss, Le Zhou |
| On-Site Speaker (Planned) |
Haijian Yang |
| Abstract Scope |
This study investigates the microstructural characteristics and mechanical properties of a laser powder bed fused (LPBF) hypereutectic Al-16Ce-1Mg alloy in the as-built and heat-treated conditions. Using optimal LPBF processing parameters, an ultimate tensile strength of 542 MPa was achieved. Hot isostatic pressing (HIP) resulted in a significant improvement in inductility at a loss of strength. Notably, the Portevin-Le Chatelier (PLC) effect was observed in the heat-treated samples and was further examined for its strain rate sensitivity. The creep property and deformation mechanisms of the alloy were investigated in the temperature range of 250-400°C. Denuded zones along the grain boundaries were observed for all crept samples, but not in samples heat-treated (i.e., no stress) with the same temperature and duration. Comprehensive microstructural characterizations were conducted to correlate the microstructure to mechanical properties. These findings provide valuable insights for developing printable Al-Ce based alloys with improved mechanical properties and creep resistance. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Aluminum, Mechanical Properties |