| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Refractory Metals 2025
|
| Presentation Title |
Microstructure and mechanical properties of a Mo-Si-B-Ti alloy manufactured by laser powder bed fusion |
| Author(s) |
Longfei Liu, Liam Wood, Phalgun Nelaturu, Dan Thoma, John H. Perepezko |
| On-Site Speaker (Planned) |
Longfei Liu |
| Abstract Scope |
To advance the applications of Mo-base alloys targeted for high temperature use new alloys are under development. In the current study a Mo-3.3 at.%Si-4.5 at.%B-10 at.%Ti alloy was manufactured by in-situ reactive synthesis-based laser powder bed fusion (LPBF) from a mixture of Mo, Si3N4, BN and Ti powder to yield a microstructure of Mo dendrites and an interdendritic Mo + Mo5SiB2 eutectic. A high-throughput parameter survey was done with 100 samples to identify 10 optimized parameters to print near full density samples. In a 1 kgf Vickers’ hardness test samples exhibited no cracks and the compression samples show a high ultimate stress (~1.6 GPa) and high strain (~30%). A detailed microstructure analysis revealed a different deformation behaviour in the different solidification regions. The high stored energy, fine grain size and Ti addition are the main contributors to the high ultimate compression stress and high strain at room temperature. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, Mechanical Properties |